Here's what i did to make the Canadarm work with tweakscale PART { // --- general parameters --- name = ISS CanadArm2 module = PartRoboticArmCanadarm author = BobCat Romfarer // --- asset parameters --- mesh = model.mu scale = 1.25 specPower = 0.1 // --- node definitions --- // definition format is Position X, Position Y, Position Z, Up X, Up Y, Up Z, size node_stack_top = 0.0, 0.0, 0.01, 0.0, 0.0, 1.0, 1 node_attach = 0.0, 0.0, 0.01, 0.0, 0.0, -1.0, 1 // -0.05 // --- editor parameters --- TechRequired = robotics entryCost = 990 cost = 990 category = Science subcategory = 0 title = ISS CanadArm2 manufacturer = BobCat Romfarer description = A working replica of the CanadArm2 used on the ISS. // attachment rules: stack, srfAttach, allowStack, allowSrfAttach, allowCollision attachRules = 1,1,1,0,0 // --- standard part parameters --- mass = 2 dragModelType = default maximum_drag = 0.08 minimum_drag = 0.06 angularDrag = 1 crashTolerance = 30 maxTemp = 2650 breakingForce = 6300 breakingTorque = 6300 MODULE { name = TweakScale type = free } MODULE { name = LazorRoboticArmCanadarm } } //stagingIcon = CUSTOM // ----- DO NOT EDIT BELOW THIS POINT ------