Im a non-pro so was tackling the cartridge removal with some novice trial and error...
- I did remove the clip...
- Broke the cartridge tabs after trying to turn it 45 degrees clockwise with the dinky plastic removal tool
- Unfortunately, the core post had already been broken off (was reason for repair), so no tap and die solutions possible with MOEN removal tool.
- So.... I drilled a small hole throught one of the broken plastic tabs till I hit the metal cylinder within
- Used a thin screw through same hole, when it hit the metal cylinder it actually pulled plastic cylinder portion out ~ 3/4"! Enough to get pliers on to complete the job.
Quite by accident but no special tools necessary! Picture below (note I had drilled 2 holes in case I needed another screw which I didn"t).