The photo shows where I've gotten so far. Screw & Handle are out but the rest of the assembly won't budget. There is no set screw best I can tell. When I feel around the part of the handle that's left there is one area with 2 metal tabs. I tried pushing and prodding but it didn't do anything. I've also used penetrating oil & vinegar and let it stand for about 4 hours already. I am using a faucet puller but the center pin of the faucet puller seems like it isn't long enough to reach the cartridge. Should I find another metal rod to stick in there to lengthen the puller? Any other ideas? I tried utilizing the screw of the handle by putting a few twists into it but the puller center pin would either slip off or actually keep screwing in the screw if you can imagine that.