Haven't done any DIY in a while, and for some reason the opamp swap intrigues me, since I have a Modi MB V2. Nobody has stock of the 1656, but Mouser has 2156. I ordered 10 since I just couldn't bring myself to pay $8 shipping for one $3 chip. So here's the deal - any US Friend that wants to do a swap, let me know and I'll mail you one. Let's say 8 available, I'll hang on to an extra. I'll do it in order of PMs received.