PCMEM,
Thanks, I have also tried that. It works fine on removing, but I didn't have much luck installing. I always mount/dismount it in my garage floor that is level and solid as well.
I mostly use my bagger for when I let the lawn get too high, and of course the leaves in the Fall (can't beat it for those).
I also am impressed by the European version with the clam shell, but suspect that would be even more costly.