Hi Dave, (BTW - great first name)
There about a thousand ways to do this. I have attached a couple photos for examples.
2196 is early on when I was fitting the wings and needing to level the fuselage. I made a cheap/low tech carriage to bolt under the gear pads - this was mostly for wheeling the fuselage around; and, then when I needed to level things up, I simply used a combination of whatever boxes/wood blocks/sandbags on the tailskid to get it to level. For lateral leveling - plywood pieces of various thicknesses in combination under the correct carriage wheel did the job.
2636 is later on when I had the gear on. - the tail dolly is an improvisation to move the plane in and out of the garage with the wings folded. There is a reason for the intermediate height of the improvised tail dolly - high enough to get the prop under the garage door and low enough to get the tail in. Again - when I needed to level it up for various purposes - just used whatever wood blocks, etc which would be the right height. For lateral leveling - plywood pieces of various thicknesses in combination under the correct main wheel was used.
Hope that helps some - there really isn't a specific jig for leveling - but a person can improvise many ways to get it - low tech and simple works.
The dirt bags
in the cockpit were for balancing before the engine was attached.
Sincerely,
Dave S
KF7 Trigear
912ULS Warp