Johnboy
This is what I did with my BP clone. My garage floor is neither flat nor horizontal, so each time I move it I have to re-level it. I like to move my stuff around periodically as my focus flits to my latest fad. I bought 4 resilient mounts for about a tenner (UK) each. Fitting them wasn't completely straightforward but hardly a challenge.
The 4 holes in the base don't extend down to floor level in mine and I'm guessing that's typical for most BPs and clones. So I had to machine up 4 spacers about 4" long to transfer the weight of the machine from the feet to the underside of the base casting, then make some female locking bolts to hold the feet in place from above. Works nicely and you can easily access the adjuster nuts. Now you just loosen off the locking bolt, hold the nut and bolt from turning and spin the foot up or down, then lock again.
Once again we can marvel at super lovin' Windows 8.1. No matter what I do with the photos here, W8 knows better in the end, so they are stuck in what I'm guessing is the original orientation of the iPhone that took them. W7 works fine but I only have access to a W8 machine. I recently paid $70 extra to get W7 on a recent laptop purchase for one of the boys in preference to the default W8.
Murray