Glad to read you only scared yourself. I'd bet we all scare ourselves from time to time. I have a few scars to prove what a slow learner I can be from not following through with reexamining what went wrong. Here's my two cent's worth: All of my 'heavy' tools are mounted on homemade solid-platform dollies ballasted where needed with 5 gallon buckets filled with scrap metal or gravel. The tools are bolted to the platforms, and sometimes I build up the base to raise the working part of the machine to a comfortable height. I'm lucky to have a concrete floor to work on, so gently tapered 2x4 wedges jammed under the platform hold the machine firmly while it's in use. Where I have to move out into the gravel area, the 3" casters still work OK, but smaller ones sink, so I'll suggest the larger sizes if you work on grassy areas. When it's really mushy, I use dolly-wide plywood scraps in a leap-frog sequence to move things about.