In the end, what were your changes to the original design? Can you please share a short summary of what parts you changed/added to Joshatdot's schematic/parts list.
My custom CMoy Boards Arrived! **Pics inside & Parts List**
My parts list has different resistors, capacitors, and op-amp (though, again, I don't recommend the OPA2228 op-amp without decoupling capacitors). I examined each component and tried to find the highest-quality part that Digi-Key stocked. The values of the resistors are lower and the ratio between them results in a gain of ~5.51 instead of the usual 11. The gain is calculated with the following formula: (R4/R3) + 1. I chose these particular values because they worked well in the similar Mini^3 amplifier, and because my low-impedance headphones didn't need a lot of amplification. They didn't even need a gain of 5, but some op-amps require a certain amount of gain to be stable, so it's a good value for compatibility.
I chose to jumper the R5 pads, and I also jumpered the input capacitor pads (C2), so those parts are not included in my list. My prototype used R3-value resistors for C2, as seen in my list, but they didn't really make a difference.
So, all of the most important parts are different, and eventually I needed an extra pair of capacitors for bypassing/decoupling (better purchased from Digi-Key than Radio Shack)--these aren't in the list, since they require some custom work. You might also decide to go with a 1,000 uF power capacitor instead of the 470 uF, since the 470 is already so large that it needs to be bent over to fit inside a mint tin.
I think I'll re-do my list later this evening and post it in Joshatdot's CMoy thread.