This is my first real bike purchase and I may have gotten screwed a little. It didn't come with a proper fitting, He offered to make any adjustment I need, but honestly I don't think he knows how to do a fitting. My question is, adjusting the seat angle, can you? Page 9 of the manual says "the saddle head is bonded in place, do not attempt to move or adjust it", but then shows another piece called the "inner clamp" and shows that in an exploded view seemingly adjustable. I could not get it to adjust and I don't want to force it. Does anyone know? Thanks