Slab
Occasional Tour Caddy
I do every now and then give the Stricker method a blast - lift the heel up a touch
But it will depend on what you think you are having issues with - if the backswing seems a bit "judery" ( if that's a word) it could be the wrists moving ever so slightly so might be worth getting a fatter grip to encourage quieter wrists without the need to throttle or strengthen the grip ?
yeah I've gone down the jumbo grip route and it definitely helps (what doesn't help is the office putter is a TM Rossa with standard grip so I guess I'm mixing it too much)
Weirdly I get more chance to practice putt at work than I do on the practice green or home