I am happy to see this, I have a modified twin force. I bought it off Pro mod on Ebay a few years ago, It's running a new era chassis and a center diff, not sure on diffs, but they hold a 2250 lehner on 6s easy enough. I broke the housing tube near the rear knuckle and glad to know there will be easy to find replacement parts now, I know Amain should carry most pieces
Anyways, here some pics on my toy
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BTW, I wouldn't mind getting the axle housings posted above, but don't like the arms, would limit free travel of each wheel