How long did it take before the bike stopped feeling like a chore? I did the same thing with my truck about two months back and now I get annoyed when I HAVE to drive somewhere. The math adds up fast too, I was burning half a tank just on short trips to the hardware store and corner market. My legs hated me the first week but now the ride is honestly the best part of my day.

That release they want signed is basically hush money, which makes their refusal look real bad.

Blending being "included" and blend time showing up on the invoice are two different things, so I get why you're ticked. But here's the part that trips people up: blend time is a real line item in most shop software, so it'll print on the invoice even when the shop already ate it in the quoted price. What matters is whether that blend line adds up to more than the $2,100 you agreed on at the end. If the total still came out to $2,100, the line is just the shop showing their work and you didn't actually pay extra for it. If the total crept past the quote, then yeah, they slid the blend charge in after telling you it was covered and you should push back on that.