The front seat mount is the one that came with the kit as the rear seat mount.
It fits straight onto the rear seat base tube through the frame.
I thought about using a Rans clamp but this was easy.
I made a U-bracket for the rear of the seat that bolts to chromoly tubes which replace the supplied rear stays.
The seat is one I had in the shed, probably from Raptobike.
The seat bag came with a Carbent I used to own.
I wanted to keep the BB as high as possible, and the seat as low as possible, hence seat position.
I do have some misgivings about the CoG possibly being too far back for steep or gravel roads.
Weather is alternating rain, hail and sunshine so I may fit narrower tyres with mudguards for extended testing.
My X-seam is about 43" IIRC.