The other thing I’m noticing in that screen grab you posted is rolling leveling feet. They look exactly the same as the ones I have gotten from Amazon in the past for shop cabinets. I wonder if this is an approved method for moving the machine around the shop.
Probably safer to build a frame than to have the legs shaking around independently.
Instead of using the Footmaster type of casters I went with these removable casters I found on Amazon. This way I can level everything using the OEM levelers, move the machine to another location, then move it back to the same (marked) position on the floor (so it’s level again), remove the caster assembly so there’s no tripping hazard, then start milling. Rinse and repeat.
If you pop the lever up quickly, yes, it can. I lift by pressing the lever down with my foot. When lowering, I slowly raise the lever up by hand. This might not be possible with a very heavy workbench, but it’s very doable with my 200+ lb. 2x4 Altmill.
I had no step drill available and used a regular drill bit. There was some grabbing involved but the amount of metal removed is tiny so with a little bit of caution there were no issues.
If you have plans to mount the removable casters (linked in my previous post) on an Altmill, you’ll need to drill 4 new holes to use them.. The existing holes on the bottom of each leg don’t line-up, plus they’re not low enough to raise the OEM leveler off the floor. The caster comes with really long flat-head screws. Unfortunately, they look awkward protruding on the back side of the leg. I picked up some shorter SS screws to use. Have to make sure the screws are flush with the bracket or you won’t be able to slide the caster assembly into the slot.