Q1: Those are the clipping diodes and can be swapped for just about any diodes LED's, 1n914's,1n270 unobtanium, unicorn tears... etc. Or left empty if you're doing the clipping switch.
http://www.madbeanpedals.com/forum/index.php?topic=5399.msg46670.msg#46670
Q2: shouldn't make too much of a difference if any.
Richard
http://www.madbeanpedals.com/forum/index.php?topic=5399.msg46670.msg#46670
Q2: shouldn't make too much of a difference if any.
Richard