Just bought one and have completed about 90% of the final project. I used it once noe to go to the local Lowes for plywood and 2x4s bounced a bit till I loaded but tracked very good and I am pleased. I made some errors in putting the plywood down so quick as it is I cant unbolt it to fold up and that was a main reason for getting the folding model so I will go back and rework a bit. any suggestions on how to make it easy to bolt and unbolt quickly ans I do need to fold to store. I need once it is folded to pull it across a carpeted floor to get to where I plan to store it but am concerned that the small casters might prove to be a problem. HF has a great selection of casters and bigger is better (right?) Any thoughts on what pitfalls I might encounter.