Siou

Cool, thanks ! I had a look into the docs... Not so bad (I am a programmer). I implemented as suggested but... The issue is still the same. Both versions of ion thrusters have different behaviour and control boxes ! I have more detailed boxes for stock part for example. Are the stock parts somewhat specific by nature compared to added parts ? Or are there other installed mods than modify my stock part only and not my custom copied part ?

Ok might do what I want, but I am not used to work with module manager. Where do you put these lines ? Any module manager starting guide link you can give ?

Hey guys ! I am running a freshly installed KSP 1.6.1 and I decided to install RSS. Someone told me to use SMURFF to adapt fuel, tanks, etc to RSS sizing. So I did it. Seems working fine but I noticed an issue with ion engine. So I decided to clone the part, changing name in ionEngine.cfg and put it in a custom mod directory under GameData. But it ended in a weird way... The engine do not have the same control box in VAB as well in flight (look at images). So what is wrong ?