There are several light duty swing away jacks with an attached dolly wheel. I've used a 600# Fulton ( at least that's who I think made it), it has a short travel to it. It has a universal bolt up creation..but I stripped it off, trimmed down the mounting plate with a torch, cleaned it up and welded it up on the A member. The real thing is to make things fit up close.
If mounting on an A member, try to keep it as close to the coupler as possible, yet still make it swing up and away. Also...crank it down when moving the trailer across rough ground. Leverage is your enemy on a jack raised high. This one on the Rocketear folds back with the handle just short of the coupler. To figure out a location point, place it in the folded position first so that the crank is where you want it...then mark the welding/bolting point, Just a suggestion. Doug
