diff --git a/src/Scalar/Scalar.jl b/src/Scalar/Scalar.jl
index 91df8d2..8af5c88 100644
--- a/src/Scalar/Scalar.jl
+++ b/src/Scalar/Scalar.jl
@@ -24,20 +24,40 @@ import Base.show
 struct ScalarParm{N,T}
     kap::NTuple{N,T}
     eta::NTuple{N,T}
+    muh::T
+
+    function ScalarParm(kv::NTuple{2,T}, ev::NTuple{2,T}, mu::T) where T
+
+
+        return new{2,T}(kv,ev,mu)
+    end
+    function ScalarParm(kv::NTuple{N,T}, ev::NTuple{N,T}) where {N,T}
+
+
+        return new{N,T}(kv,ev,0.0)
+    end
 end
+
 function Base.show(io::IO, sp::ScalarParm{N,T}) where {N,T}
 
     println(io, "Number of scalar fields: ", N)
-    print(io, "Kappas: ")
+    print(io, " - Kappas: ")
     for i in 1:N
         print(io, " ", sp.kap[i])
     end
-    print("\netas:   ")
+    print("\n - etas:   ")
     for i in 1:N
         print(io, " ", sp.eta[i])
     end
-    println("\n")
+    if N == 2
+        print("\n - mu12:   ")
+        println(io, " ", sp.muh)
 
+    end
+    println("\n")
+    
+
+    
 end
 export ScalarParm
 
diff --git a/src/Scalar/ScalarAction.jl b/src/Scalar/ScalarAction.jl
index ba1b52b..e3b042f 100644
--- a/src/Scalar/ScalarAction.jl
+++ b/src/Scalar/ScalarAction.jl
@@ -62,4 +62,47 @@ function krnl_act!(act, U::AbstractArray{TG}, Phi::AbstractArray{TS}, sp::Scalar
 
     return nothing
 end
+
+function krnl_act!(act, U::AbstractArray{TG}, Phi::AbstractArray{TS}, sp::ScalarParm{2,T}, lp::SpaceParm{N,M,D}) where {TG,TS,T,N,M,D}
+
+
+    b, r = CUDA.threadIdx().x, CUDA.blockIdx().x
+
+    Ush = @cuStaticSharedMem(TG, (D,N))
+    Psh = @cuStaticSharedMem(TS, (D,2))
     
+    for id in 1:N
+        Ush[b,id] = U[b,id,r]
+    end
+    for i in 1:2
+        Psh[b,i] = Phi[b,i,r]
+    end
+    sync_threads()
+    
+    S = zero(eltype(act))
+    for id in 1:N
+        bu, ru = up((b, r), id, lp)
+        
+        for i in 1:2
+            if ru == r
+                Pup = Psh[bu,i]
+            else
+                Pup = Phi[bu,i,ru]
+            end
+            
+            S += -2*sp.kap[i]*dot(Psh[b,i],Ush[b,id]*Pup)
+        end
+    end
+    
+    for i in 1:2
+        sdot = dot(Psh[b,i],Psh[b,i])
+        S += sdot + sp.eta[i]*(sdot - 1)^2
+    end
+    S += 2*sp.muh*dot(Psh[b,1], Psh[b,2])
+    
+    I = point_coord((b,r), lp)
+    act[I] = S
+
+    return nothing
+end
+
diff --git a/src/Scalar/ScalarFields.jl b/src/Scalar/ScalarFields.jl
index 41b26b2..6609657 100644
--- a/src/Scalar/ScalarFields.jl
+++ b/src/Scalar/ScalarFields.jl
@@ -24,7 +24,7 @@ end
 function krnl_assign_SU2fund!(f::AbstractArray{T}, m, sp::ScalarParm{NS}, lp::SpaceParm) where {T, NS}
 
     # Think about precision here
-    SR2 = 1.4142135623730951
+    SR2::eltype(sp.kap) = 1.4142135623730951
     
     b, r = CUDA.threadIdx().x, CUDA.blockIdx().x
     for i in 1:NS
diff --git a/src/Scalar/ScalarForce.jl b/src/Scalar/ScalarForce.jl
index d18c4d0..887cf66 100644
--- a/src/Scalar/ScalarForce.jl
+++ b/src/Scalar/ScalarForce.jl
@@ -63,3 +63,48 @@ function krnl_force_scalar!(fgauge, fscalar, U::AbstractArray{TG}, Phi::Abstract
 
     return nothing
 end
+
+
+function krnl_force_scalar!(fgauge, fscalar, U::AbstractArray{TG}, Phi::AbstractArray{TS}, sp::ScalarParm{2,T}, gp::GaugeParm, lp::SpaceParm{N,M,D}) where {TG,TS,T,N,M,D}
+
+    b, r = CUDA.threadIdx().x, CUDA.blockIdx().x
+
+    Ush = @cuStaticSharedMem(TG, (D,N))
+    Psh = @cuStaticSharedMem(TS, (D,2))
+    
+    for id in 1:N
+        Ush[b,id] = U[b,id,r]
+        fgauge[b,id,r] = (gp.beta/gp.ng)*fgauge[b,id,r]
+    end
+    for i in 1:2
+        Psh[b,i] = Phi[b,i,r]
+    end
+    sync_threads()
+
+    for i in 1:2
+        fscalar[b,i,r] = zero(TS)
+        for id in 1:N
+            bu, ru = up((b,r), id, lp)
+            bd, rd = dw((b,r), id, lp)
+
+            if ru == r
+                p1 = Ush[b,id]*Psh[bu,i]
+            else
+                p1 = Ush[b,id]*Phi[bu,i,ru]
+            end
+
+            if rd == r
+                fscalar[b,i,r] += (2*sp.kap[i])*(p1 + dag(Ush[bd,id])*Psh[bd,i])
+            else
+                fscalar[b,i,r] += (2*sp.kap[i])*(p1 + dag(U[bd,id,rd])*Phi[bd,i,rd])
+            end 
+            
+            fgauge[b,id,r] -= (2*sp.kap[i])*projalg(p1*dag(Psh[b,i]))
+        end
+        fscalar[b,i,r] -= ( 2 + 4*sp.eta[i]*(dot(Psh[b,i],Psh[b,i])-1) ) * Psh[b,i]
+    end
+    fscalar[b,1,r] -= 2*sp.muh*Psh[b,2]
+    fscalar[b,2,r] -= 2*sp.muh*Psh[b,1]
+
+    return nothing
+end
diff --git a/src/main/test_kapp.jl b/src/main/test_kapp.jl
index b449e68..cb5ac9d 100644
--- a/src/main/test_kapp.jl
+++ b/src/main/test_kapp.jl
@@ -11,8 +11,8 @@ lp = SpaceParm{4}((16,16,16,16), (4,4,4,4))
 gp = GaugeParm(2.25, 1.0, (0.0,0.0), 2)
 
 NSC = tryparse(Int64, ARGS[1])
-println("Space  Parameters: ", lp)
-println("Gauge  Parameters: ", gp)
+println("Space  Parameters: \n", lp)
+println("Gauge  Parameters: \n", gp)
 GRP  = SU2
 ALG  = SU2alg
 SCL  = SU2fund
diff --git a/src/main/test_scalar.jl b/src/main/test_scalar.jl
index 4799748..d402e13 100644
--- a/src/main/test_scalar.jl
+++ b/src/main/test_scalar.jl
@@ -8,7 +8,7 @@ using LatticeGPU
 
 lp = SpaceParm{4}((16,16,16,16), (4,4,4,4))
 gp = GaugeParm(6.0, 1.0, (0.0,0.0), 2)
-sp = ScalarParm((0.2,0.3), (1.0,0.4))
+sp = ScalarParm((0.2,0.3), (1.0,0.4), 0.5)
 
 NSC = length(sp.kap) #number of scalars = # of k coupling
 println("Space  Parameters: ", lp)
@@ -38,10 +38,6 @@ println("Allocating scalar field")
 Phi = nscalar_field(SCL{PREC}, NSC, lp)
 fill!(Phi, zero(SCL{PREC}))
 
-#initialize observables
-watch = Obs( PREC, lp, sp, gp )
-
-
 println("Initial Action: ")
 @time S = gauge_action(U, lp, gp, ymws) + scalar_action(U, Phi, lp, sp, ymws)
 
@@ -68,11 +64,6 @@ for i in 1:10
     println("# HMC: ", acc, " ", dh)
     push!(pl, plaquette(U,lp, gp, ymws))
     println("# Plaquette: ", pl[end], "\n")
-    #measure
-    (rho2, lphi, lalpha) = updt_obs!(watch, U, Phi, sp, lp)
-    push!(rho2_v,rho2)
-    push!(lphi_v,lphi)
-    push!(lalpha_v,lalpha)
 end
 
 print_timer(linechars = :ascii)