diff --git a/TODO.md b/TODO.md
index 4153fc3..3c568dc 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,14 +1,15 @@
 # TODO
 
 ## Features
-- implement import of non-datalad projects
-- implement a way to use another backlog repo as a project
+- [ ] implement import of non-datalad projects
+- [ ] implement a way to use another backlog repo as a project
 
-- find a way to convey the mathematical structure of what EXACTLY is the form of the correlator in a specific project
+- [ ] find a way to convey the mathematical structure of what EXACTLY is the form of the correlator in a specific project
     - this could e.g. be done along the lines of mandatory documentation
-- keep better track of the versions of the code, that was used for a specific measurement.
+- [ ] keep better track of the versions the code, that was used for a specific measurement.
     - maybe let this be an input in the project file?
     - git repo and commit hash/version tag
+- [ ] implement local caching with pickle files
 
 ## Bugfixes
 - [ ] revisit the reimport function for single files
diff --git a/corrlib/find.py b/corrlib/find.py
index 432bb26..a1b25f9 100644
--- a/corrlib/find.py
+++ b/corrlib/find.py
@@ -5,7 +5,6 @@ import json
 import pandas as pd
 import numpy as np
 from .input.implementations import codes
-from .tools import m2k, k2m
 # this will implement the search functionality
 
 
@@ -66,33 +65,11 @@ def sfcf_filter(results, **kwargs):
                 if kwargs.get('offset') != param['offset']:
                     drops.append(ind)
                     continue
-            if 'quark_kappas' in kwargs:
-                kappas = kwargs['quark_kappas']
-                if (not np.isclose(kappas[0], param['quarks'][0]['mass']) or not np.isclose(kappas[1], param['quarks'][1]['mass'])):
+            if 'quark_masses' in kwargs:
+                quark_masses = kwargs['quark_masses']
+                if (not np.isclose(quark_masses[0], param['quarks'][0]['mass']) or not np.isclose(quark_masses[1], param['quarks'][1]['mass'])):
                     drops.append(ind)
                     continue
-            if 'qm1' in kwargs:
-                quark_mass1 = kwargs['qm1']
-                if not isinstance(quark_mass1, list):
-                    if (not np.isclose(quark_mass1, k2m(param['quarks'][0]['mass']))):
-                        drops.append(ind)
-                        continue
-                else:
-                    if len(quark_mass1) == 2:
-                        if (quark_mass1[0] > k2m(param['quarks'][0]['mass'])) or (quark_mass1[1] < k2m(param['quarks'][0]['mass'])):
-                            drops.append(ind)
-                            continue
-            if 'qm2' in kwargs:
-                quark_mass2 = kwargs['qm2']
-                if not isinstance(quark_mass2, list):
-                    if (not np.isclose(quark_mass2, k2m(param['quarks'][1]['mass']))):
-                        drops.append(ind)
-                        continue
-                else:
-                    if len(quark_mass2) == 2:
-                        if (quark_mass2[0] > k2m(param['quarks'][1]['mass'])) or (quark_mass2[1] < k2m(param['quarks'][1]['mass'])):
-                            drops.append(ind)
-                            continue
             if 'quark_thetas' in kwargs:
                 quark_thetas = kwargs['quark_thetas']
                 if (quark_thetas[0] != param['quarks'][0]['thetas'] and quark_thetas[1] != param['quarks'][1]['thetas']) or (quark_thetas[0] != param['quarks'][1]['thetas'] and quark_thetas[1] != param['quarks'][0]['thetas']):
diff --git a/corrlib/meas_io.py b/corrlib/meas_io.py
index 9a3806b..1f1e920 100644
--- a/corrlib/meas_io.py
+++ b/corrlib/meas_io.py
@@ -139,8 +139,8 @@ def load_records(path: str, meas_paths: list[str], preloaded = {}) -> list[Union
     returned_data: list = []
     for file in needed_data.keys():
         for key in list(needed_data[file]):
-            if os.path.exists(cache_path(path, file, key) + ".p"):
-                returned_data.append(load_object(cache_path(path, file, key) + ".p"))
+            if os.path.exists(cache_path(path, file, key)):
+                returned_data.append(load_object(cache_path(path, file, key)))
             else:
                 if file not in preloaded:
                     preloaded[file] = preload(path, file)
@@ -156,13 +156,13 @@ def cache_dir(path, file):
     cache_path_list = [path]
     cache_path_list.append(".cache")
     cache_path_list.extend(file.split("/")[1:])
-    cache_path = "/".join(cache_path_list)
+    cache_path = os.path.join(cache_path_list)
     return cache_path
 
 
 def cache_path(path, file, key):
     cache_path = os.path.join(cache_dir(path, file), key)
-    return cache_path
+    return cache_path + ".p"
 
 
 def preload(path: str, file: str):
diff --git a/corrlib/tools.py b/corrlib/tools.py
index 3ac8bfe..e424b59 100644
--- a/corrlib/tools.py
+++ b/corrlib/tools.py
@@ -9,10 +9,3 @@ def list2str(mylist):
     return s
 
 cached = True
-
-def m2k(m):
-    return 1/(2*m+8)
-
-
-def k2m(k):
-    return (1/(2*k))-4