Boss DD-3 rev 2a or 2b schematic please?

[Processaurus]

Hi, I was wondering if anyone might have the DD-3 revision 2a or 2b schematic, I'd like to do a mod to make the hold mode latching, and its kind of a jungle in there.  There are 3 different circuits for the DD-3, the early DD-2 and DD-3, which I've seen the schematic at the free information society, then the one I have, which is different, the 2a + 2b version, with through hole components except for surface mount processor, and finally version 3, which is all surface mount.

Mine is differing from the DD-2 schematic a bunch, I've tracked the hold as far as a quad NAND gate and its fanning out, a schematic would save a lot of time...

Thanks very much

Different version info:
http://www.stinkfoot.se/andreas/diy/articles/DD3.htm

[Processaurus]

Anyone got it?  It'll be so cool if I can get it to worrk