I will be adding main gun recoil using the MF-03 unit, and have a 1:16 scale Oddball figure to sit in the commander hatch.I will be fitting the obligatory battle system too.
Since joining this forum, I am now aware of the different suspension system on Oddballs tank
(Thanks Mark

Well, here goes.
First it was out with the Dremel to cut out the engine deck, then tidy the edges with modeling knife and files.
Then cut some lengths of Evergreen strip to form support for the new deck, fixed them in place with Platic Weld.
First test fit of new engine deck looks pretty good, even if I say so myself

All my other tanks have at least the drivers hatch that opens, so while I was in cutting out mode
decided to do the drivers and gunners hatches.
So after a few sharp blades, a lot of patience, and a couple of bloody fingers

Still awaiting delivery of the front fan cover, an aftermarket part that I hadn't seen until recently, and that will be the next thing to cut out.