I can't speak for the best leg levelers (though I know we've had other threads about them). But
@lilypad19 turned me on to these casters, and they're the best and strongest low-profile ones I'm aware of. I bought a bunch and have them on many of my games now.
They fit most existing cabinets as-is. But if the t-nuts or mounting plates on your cab are stripped or loose, the best thing is to replace them with new plates. These are the beefiest ones I know of, and will fit the casters above). They've been great, but you have to catch them when they are in stock. (They were out, then got some a month ago which I grabbed a bunch of, and now they're out again. But I'm sure he'll get more
Leg leveler mounting plate. Features:3/8" thread3" x 3" squareSteel plated
www.arcadeshop.com
And here are a couple of threads about leg levelers:
Which do you guys prefer on your cabinets? Leg Levelers or Casters?
forums.arcade-museum.com
Doesn't this make the cab slide around while you're playing it? If it does that would drive me batty.
forums.arcade-museum.com
a lot of cabs ive seen have screwin adjustable feet on their bottoms. I was thinking about getting some 2" casters so i can move my cab around easier. are there any pros and cons for casters?
forums.arcade-museum.com