Quick disclaimer, the owner of Utopia called me up and asked if I could test out their smaller sport back rest & their taller mounting bar which is being made for folks who have the comfort seat (taller). I said I'l do that so long as they send me a return label so I can get all of this back to them. I don't want free stuff but I don't mind testing it. They agreed. They're a super small shop and everything is made by hand or super limited production.
Video is being edited now but here are a few photos. I am sending back their standard mount bar since it is indeed too low so if you call to order, please make sure you let them know what size seat you have original or comfort because that does make a difference.
You can actually see the adjustment bolt sticking out on the comfort seat. Mine was previously submerged a bit and hard to tighten without putting stress on BMW's $650 leather seat so I'd nice to have it just a smidge taller without being much higher than the seat itself:
Also, they are now doing white stitching which is nice, here's the pad I had with black stitching next to a white one:
Finally, here are photos comparing the back rest pad sizes if you weren't sure if you wanted the big or small. I may send back the larger one actually and go for the small. Just style preference honestly.
Oh, another finally, they sent me some samples showing off how they construct the backrest which is super cool, it's different foams all married to a piece of bent metal and they go from there. Pretty neat and I have some decent video clips to share once I get it all edited.
Not pictured, they also sent me a pad that is plush and leather that goes around the backrest primary hinge. I call it the "penis pad" (you'll have to watch the video) but it just makes it a more comfortable pillion experience. Screenshot from the video: