I ran a search of past threads, but am still unsure of the following:

1. Are the "good" 146-100 seats the same ones listed by Seat-Guru on the maps for the 146-200 and 146-300, or is there something different about the -100, which does not have its own map on seat-guru? (Ual.com has a -100 map, and it looks similar to the other 146 configurations).

2. Will my 20-inch roll-aboard fit in the bins (assuming I don't sit in the seats with limited storage due to the wing), or will they make me gate-check it?

Thanks.