Donny, I've never used a cart...the closest I got to that was the dolly/handles on my old Hammond B-3 and we had a wooden board with wheels on it for heavy stuff that didn't have wheels.

For the solo stuff, I was never in that much of a rush when loading/breaking down gear...I always made sure I had lots of time, and carts aren't much use on stairs.

Nothing wrong with using one...it just wasn't for me.

My speakers are 25 lbs each, plus the Tyros4 is 30 lbs...that's the heaviest stuff I have right now. I'm in reasonably good shape for being nearly 65, so I don't mind a bit of lugging.

Ian