The small double joints that hold on the jets wings make me nervous, the small c-clip bars that hold the horizontal tailfins on as well.
Bee's face apparently can get scratched if it's not correctly positioned for car mode.
The wee fender parts on the Datsun bros can be tricky to get turned around on my Prowl, Silverstreak not so much, I don't have Smokesceen.
And Mp-5 Megatron should only be handled by professionals. His hip and upper thighs alone have around 20 points of movement on
tiny pieces, and unclipping his shoulders literally makes me break out in a sweat. Do
not rush it. I think there is a YouTube video that shows how, as the instructions are a little vague here and there.
I think there's pictorial instructions either here or on TFW2005 on how to properly line up Rodimus' feet and legs, in addition to the laundry list of other issues. I don't know if there is an all in one list of MP tips, seems like this thread might do for one though.
Isn't it funny that as adults we need tutorials to teach us how to not break our toys? I swear I could transform Sky Lynx blindfolded into any configuration in 30 seconds. In the time it takes to work MP Megs back and forth, I can watch a whole G1 episode.