modifiying a pre-fabbed PCB

[mordechai]

I have a GGG PCB that I'm using to build a Rangemaster circuit, but I want to incorporate an input cap blend mod and don't know how to manipulate the board to make it work.  Alternately, I have a GGG Fuzz Face PCB that DOES allow for the mod, but I am not sure how to futz with this board to have the traces work for a Rangemaster.  Any help would be REALLY appreciated.

[Processaurus]

Kludging PCB's is a really good skill to have, without seeing the board in front of me and being able to offer specifics, some of the general things you can do are:

-Cut traces with an Xacto knife
-Attach new wires (fine wire is good, fine teflon wire is the best if you do it a lot) to existing solder joints
-Drill new holes
-Somehow anchor a little daughter board, made out of perfboard, for a little prototyping area, and run wires out to it
-Unhook one end of parts and solder it to new parts, with the joint floating above the board
-Solder new parts on the trace side of the board, sometimes you see old EH stuff with a mod like that from the factory!
-If there is a soldermask, you can scrape it off a trace with an xacto or razor blade, tin it with some solder, and then solder a part right onto the trace
-Cut the trace, scrape off the solder mask on both sides of the cut, tin, and bridge the gap with a surfacemount part, great move! 

[slacker]

The easiest thing to do with that blend control is just build it on the pot, solder one cap to each outer lug and solder the other ends of the caps together. The joined ends of the caps then go to board input and replace the input cap (C1) with a jumper.

[mordechai]

That's a great idea...I will give it a shot.  But I will also try to mod the PCB just to develop the skill.  Both are helpful suggestions, so thanks very much.

[mordechai]

Actually, an additional question re: building it on the pot -- if I'm putting cap 1 on lug 1, and cap 2 on lug 3...where do I make the connection from the line in?  And do I just leave lug 2 unconnected?