I'm sure I'm not the only short pilot on this forum. For working under my RV I find the standard mechanic's creeper puts me too far from the under side of the aircraft. I thought about purchasing an adjustable creeper but after seeing the price tag I gave that up (for the amount of time I would need it).
I purchased a new creeper as my old one is getting run down and I got looking at it then realized that I could mount the frame upside down. Now the bed is up higher than the castors rather than hanging down inside the castors. The holes in the frame have square holes to keep the head of the bolt from turning and by putting the frame upside down you have to hold the head with vise grips but so what. Been using this set up for quite a while and makes working under the engine or fuselage much easier. I can even see what I'm doing now.
Good luck
I purchased a new creeper as my old one is getting run down and I got looking at it then realized that I could mount the frame upside down. Now the bed is up higher than the castors rather than hanging down inside the castors. The holes in the frame have square holes to keep the head of the bolt from turning and by putting the frame upside down you have to hold the head with vise grips but so what. Been using this set up for quite a while and makes working under the engine or fuselage much easier. I can even see what I'm doing now.
Good luck