Good luck with the project.
You'll also want to have a Flyer Drive-in for all those Flyer drives. Also, installing a PicassoII and a Multi Sync monitor into the A4000D will give you the ability to mode promote and fall back to amiga screen modes without needing a second video slot.
I am currently comptemplating this route with my A4000D/Flyer setup. Just gotta find another PicassoII as I really don't want to dismantle the A3000D quite yet.
