Chain tensioner replaced by tensioning the chain directly is an improvement,

though I've never seen any pictures of left side, how the disc mount is done..

Is it fixed on the slider with the rear axle. so unchanging with chain/belt tension.. My Koga WTR's approach.

Or like Surly's bikes tension chain. then move caliper to follow where the disc went, and

is there another 'heavy-rider option' With a front triangle its a solid Lock-up to stuff.

With just 1 big tube there is a difference between lock Through, and Around..