I'm having some issues with tweakscale and AIES that perhaps y'all could help me with... it seems that when I use a scaled AIES probe core as my root part, the part resizes to its default size once i switch to another craft or change scenes. Here's my craft in the VAB Here's my craft during ascent Here's my craft after circularization and switching back to the Space Center In the persistent.sfs file, the craft seems to have the correct tweakscale module with correct settings: VESSEL { name = GSC 1 ... PART { name = Maxurpod ... MODULE { name = TweakScale isEnabled = True tweakScale = 1.5 currentScale = 1.5 defaultScale = 1 isFreeScale = False version = 1.50.0.0 defaultTransformScale = (1, 1, 1) DryCost = 1687.5 tweakScale_UIEditor { controlEnabled = True minValue = 0.625 maxValue = 5 incrementLarge = 1.25 incrementSmall = 0.125 incrementSlide = 0.001 } EVENTS { } ACTIONS { } } As I say, this problem only seems to be with the AIES probe cores... the solar panels & batteries are all tweakscaled (some also from AIES) and their size remains fine. Does it have to do with the probe core being the root part? Also- mod list --Edit-- This seems to extend to Squad probe cores as well, so that if the root part is resized it will not retain its shape.