Jakeo

A few people have mentioned it previously and haven't noticed if they found a solution... most of the engines and the batteries/generators and xenon canisters do not correctly attach (or stack) to the rest of rocket/spaceplane, and usually fall off or cause catastrophic failure blowing up the entire vehicle. The small xenon canister that attaches to exterior just falls off instantly. Is there a parameter in the part config I can change to correct this issue? Kind Regards, Jakeo