Looking at your layout of the chassis reminds me of building my BSK from MMP, the parts just fitted. Everything was etched to perfection, yes there are a great deal of parts, but prototypical build gives the best results. My real concern, was that after spending so much time getting the brake gear to actually operate (yes it can be made so that it all moves) that painting would cover some of the really fine detail, such as the fine chains and linkages. Careful and thin painting of the chassis worked out OK.
Then there is the interior kit, another mass of parts, each compartment is seperate and then the guards area, such an enjoyable build. Keep up the good work, it will spur me on to start my FO!