Just to give you a better idea of what I did, here're some pics with the armor removed and the new body frame exposed.
I had to take a drill to the crotch plate before attaching it because it's designed to plug into the new waist piece provided by the Battle Tanker set. Instead, I simply grinded it down, smoothed it out, and super glued it to Classics Prime's butt.
I had to twist Classics Prime's waist around so his butt faced the front, and then switched the legs around- had to take all the screws out, switch'em to different sides, screw'em back in- all that jazz...
United Laser Prime's forearms were easy to screw on, but there's still an itty bitty gap where the plastic doesn't meet because Classics Prime's elbow joint is too big for the Laser's forearms to completely shut- so I'll be covering those little forearm "cracks," gaps, whatever they are- with stickers.
I even switched a bunch of parts between Classics Prime and the Asia Exclusive Magnus to get the color scheme right for the armor and G1 design.
I also drilled out Classics Prime's core, drilled out MP-10 Prime's Matrix Chamber, and installed it inside Classics Prime's chest. Now my magnus has the MP Matrix ^_^
The new inner body frame: http://www.flickr.com/photos/90909767@N ... otostream/
New Matrix Chamber: http://www.flickr.com/photos/90909767@N ... otostream/