I want to build a handful of custom snakes mainly for a few odd needs that would be overkill to buy commercially-available products but also just because I want to learn how to do it and find good sources for such projects. They will at least contain the following: 1) one balanced XLR for mics 2) one instrument cable (for guitar or bass) 3) one TRS cable for attaching to headphones or a small, stand-mounted powered monitor. Anyone know good sources of quality materials, supplies, as well as soldering/hookup diagrams? Also can you use TRS cables for non-stereo instruments such as guitar and bass? Would it screw something up or cause ground hum or just simply be in mono whereas a keyboard would be in stereo on the same type cable? Thanks for the help.