I'd have submitted a pull, but it looks like the configs aren't source controlled?
Part config from other parts works:
MODULE
{
name = TweakScale
type = IR_RoboticStock
TWEAKSCALEEXPONENTS
{
mass = 0.025, 0.05, 0.1
}
TWEAKSCALEEXPONENTS
{
name = MuMechToggle
ElectricChargeRequired = 0.5,1.0,2.0
}
}