diff --git a/nodes/3.x/python/FileSystem.FileSize.py b/nodes/3.x/python/FileSystem.FileSize.py
index db2c5a4f..a4acff35 100644
--- a/nodes/3.x/python/FileSystem.FileSize.py
+++ b/nodes/3.x/python/FileSystem.FileSize.py
@@ -1,5 +1,5 @@
 import clr
-import System.IO.FileInfo
+import System.IO
 
 def GetFileSize(file):
 	if str(file.GetType()) == "System.IO.FileInfo":
diff --git a/nodes/3.x/python/RandomList.AsIntegers.py b/nodes/3.x/python/RandomList.AsIntegers.py
index 9c01e040..23bed0af 100644
--- a/nodes/3.x/python/RandomList.AsIntegers.py
+++ b/nodes/3.x/python/RandomList.AsIntegers.py
@@ -1,5 +1,5 @@
 import clr
-import System.Random
+import System
 
 min = IN[0]
 max = IN[1]
diff --git a/nodes/3.x/python/System.CPUs.py b/nodes/3.x/python/System.CPUs.py
index 415ee92c..b2a925b1 100644
--- a/nodes/3.x/python/System.CPUs.py
+++ b/nodes/3.x/python/System.CPUs.py
@@ -3,11 +3,11 @@
 from System.Management import ManagementObject, ManagementObjectSearcher
 sysinfo = ManagementObjectSearcher("Select NumberOfProcessors, NumberOfLogicalProcessors from Win32_ComputerSystem").Get()
 for sysdata in sysinfo:
-	physicalProcessors = sysdata.Item["NumberOfProcessors"]
-	logicalProcessors = sysdata.Item["NumberOfLogicalProcessors"]
+	physicalProcessors = sysdata.get_Item("NumberOfProcessors")
+	logicalProcessors = sysdata.get_Item("NumberOfLogicalProcessors")
 sysinfo = ManagementObjectSearcher("Select NumberOfCores, MaxClockSpeed from Win32_Processor").Get()
 cores = 0
 for sysdata in sysinfo:
-	cores += sysdata.Item["NumberOfCores"]
-	cpuspeed = sysdata.Item["MaxClockSpeed"]
+	cores += sysdata.get_Item("NumberOfCores")
+	cpuspeed = sysdata.get_Item("MaxClockSpeed")
 OUT = (physicalProcessors, logicalProcessors, cores, float(cpuspeed)/1000)
\ No newline at end of file
diff --git a/nodes/3.x/python/System.Memory.py b/nodes/3.x/python/System.Memory.py
index 4eb3214b..c8c67b6d 100644
--- a/nodes/3.x/python/System.Memory.py
+++ b/nodes/3.x/python/System.Memory.py
@@ -5,9 +5,9 @@
 sysinfo = ManagementObjectSearcher("Select Capacity from Win32_PhysicalMemory").Get()
 installedMem = 0
 for sysdata in sysinfo:
-	installedMem += sysdata.Item["Capacity"]
+	installedMem += sysdata.get_Item("Capacity")
 sysinfo = ManagementObjectSearcher("Select FreePhysicalMemory from Win32_OperatingSystem").Get()
 for sysdata in sysinfo:
-	freeMem = sysdata.Item["FreePhysicalMemory"]
+	freeMem = sysdata.get_Item("FreePhysicalMemory")
 procMem = Process.GetCurrentProcess().WorkingSet64
 OUT = (float(installedMem)/1073741824, float(freeMem)/1048576, float(procMem)/1073741824)
\ No newline at end of file
diff --git a/nodes/3.x/python/TimeSpan.EvaluateLapTimes.py b/nodes/3.x/python/TimeSpan.EvaluateLapTimes.py
index 8de0ca6e..78f60262 100644
--- a/nodes/3.x/python/TimeSpan.EvaluateLapTimes.py
+++ b/nodes/3.x/python/TimeSpan.EvaluateLapTimes.py
@@ -1,2 +1,3 @@
 import clr
-OUT = [x - y for x, y in zip(IN[0][1:], IN[0][:-1])], IN[0][-1]-IN[0][0]
\ No newline at end of file
+from System import DateTime
+OUT = [x.Subtract(y) for x, y in zip(IN[0][1:], IN[0][:-1])], IN[0][-1].Subtract(IN[0][0])
\ No newline at end of file
diff --git a/nodes/3.x/python/VersionNumber.Compare.py b/nodes/3.x/python/VersionNumber.Compare.py
index bffffed0..cf0a18f3 100644
--- a/nodes/3.x/python/VersionNumber.Compare.py
+++ b/nodes/3.x/python/VersionNumber.Compare.py
@@ -3,8 +3,8 @@
 from System import Version
 
 if isinstance(IN[0], list): 
-	if isinstance(IN[1], list): OUT = [x.CompareTo(y) for x,y in zip(IN[0], IN[1])]
-	else: OUT = [x.CompareTo(IN[1]) for x in IN[0]]
+	if isinstance(IN[1], list): OUT = [Version(x).CompareTo(Version(y)) for x,y in zip(IN[0], IN[1])]
+	else: OUT = [Version(x).CompareTo(Version(IN[1])) for x in IN[0]]
 else: 
-	if isinstance(IN[1], list): OUT = [IN[0].CompareTo(x) for x in IN[1]]
-	else: OUT = IN[0].CompareTo(IN[1])
\ No newline at end of file
+	if isinstance(IN[1], list): OUT = [Version(IN[0]).CompareTo(Version(x)) for x in IN[1]]
+	else: OUT = Version(IN[0]).CompareTo(Version(IN[1]))
\ No newline at end of file
diff --git a/nodes/3.x/python/Wall.Orientation.py b/nodes/3.x/python/Wall.Orientation.py
index 052cd21c..44818652 100644
--- a/nodes/3.x/python/Wall.Orientation.py
+++ b/nodes/3.x/python/Wall.Orientation.py
@@ -17,7 +17,7 @@ def WallOrientation(wall):
 			if flipped: return wall.Orientation.ToVector().Reverse()
 			else: return wall.Orientation.ToVector()
 		else:
-			direction = (lcurve.GetEndPoint(1) - lcurve.GetEndPoint(0)).Normalize()
+			direction = (lcurve.GetEndPoint(1).Subtract(lcurve.GetEndPoint(0))).Normalize()
 			if flipped: return XYZ.BasisZ.CrossProduct(direction).ToVector().Reverse()
 			else: return XYZ.BasisZ.CrossProduct(direction).ToVector()
 	else: return None