What are you talking about? That was totally relevant! I was suggesting if he got bigger casters hed be able to pull it so easily he could use his eye lids! Geez.
sorry cooldog, I do tend to go off in tangents like that
But yeah, if you use bigger casters you should get less hung up on small imperfections on the surface youre trying to move accross. If you want a "robot" to help you push it, you could get a wheel chair motor or two, hook them up to a speed reduction gear set(which gives more torque), and just use a regular toggle switch to switch between go and dont go.