Hey all!
Glad I found this forum here. Thought I was the only crazy person trying to mod this monstrosity!
So far I have a roof mounted lift arm that slides out to be deployed. The lift arm snaps into a single stud connection with is surprisingly robust. A motor (mounted in place of the fuel cells up top) is what I have to run the system. Having a bunch of issues with it just snagged and I think I am probably going to go with a manual crank system. The detail in this set is just too nice to sacrifice for a large, ugly battery pack and will leave room for another lift arm to be deployed on the other side!
As for the floor, added in a few hatches that take advantage of some of the negative space in the internal chassis. Have began to black out this area, but as you can see, some of the bright colored technic frame still shows through (excuse the dust, work has got the best of me).