Woodlander,
Here is the method:
Obtain a flat surface and place it on the level.
Stand your chair on the level, flat surface and chock the leg(s) as required to make the seat level and at the slope-back angle it should be.
Take a small. flat piece of wood and drill it to hold a pencil horizontal to the flat base.
Sliding the flat bottom of the piece of pencil-holding wood on the level surface whereupon stands the chair, draw around the circumference of each chair leg. The pencil must reach at least as high at the bottom of the chair leg under which the largest chock sits.
You now have pencil marks showing you where to saw off the chair legs to make the chair sit aright.
Lataxe
Replies
A variation on Lataxe's method..........
Sit your chair on a flat surface (your workbench should work) with three legs on the bench and the fourth leg hanging over the edge. Mark the overhanging leg at the surface of the bench and cut it parallel with the bench surface. Ta-Daa!! Your chair sits firmly on all four legs.
Your chair will sit solidly on all 4 legs but not level. You should divide the cutoff portion by two and remove that amount from each of the two diagonally opposite longest legs.
Good point. I should have said to rotate the chair to find the three legs that make the seat level (or most level) and "fix" the fourth leg.
I made a coffee table once that was slightly off and did the "three legs on the bench" trick to find the bad leg. The legs had plastic glides and a folded business card under one of the glides took care of the problem.
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