Hi all! I ride tandem with my friend (I'm in the back). My problem is that the seat is about 2" too far forward so that I must sit my butt back off the end of the seat. I can't find an angled seat post that would adjust the seat back another couple of inches. Anyone know of an extra long seat underbrackets that can adjust to move the seat further back? Or.....an angled seat post that makes the seat sit back further?