Quote Originally Posted by Pilsbury View Post
Yes, it is indeed a shed. Although the base is solid, slabs, 4x2, boards and ply on top, the machine still wobbles a bit as it’s doing it’s thing due to the weight and swift movements. A job for the future is to move it, cut through the shed base, dig down and fill holes with concrete so the 4 legs each have their own solid pad.
You can also consider doing what I did.

http://www.mycncuk.com/threads/14390...-heavy-DIY-CNC

I would just try to lower it from the castors to the floor and let it rest on some extra wooden blocks. To me it was a big improvement when I did that. It is less dramatic than having to do what you plan to do, but of course, if the floor you have is not stable enough, then you might need to reinforce it, but I would still not bolt the machine to the floor, or to any concrete pads.