By careful assembly, checking using an accurate right-angle, no further adjustments were required: the critical step was cross tightening the bolts in an iterative manner while the trac and handle were held clamped in position at 90 degrees. The bolts were a tight fit, but no adjustments of materials were required. Clamping during assembly avoided any play, and right-angle accuracy was preserved when the clamps were removed. An absolute delight to use.

I ordered the Simple Square kit that contained a 24" section of track. Everything was delivered and it was well packaged. I followed the instructions and had a little trouble getting it square. I loosened all 8 bolts and seemed to have succeeded in achieving a good 90 degree position. But when I went to use the Simple Square to square up a new board, I found it was off again. I have a panel T square for a reference and it is accurate. So I followed the alignment directions again. I found that every time I tightened the shoulder bolts, the square would revert to its original position. I reamed out the 4 bolt holes in the handle to get some adjustment clearance. This time it squared up easily and stayed square after tightening the bolts. I have used it about 10 times since and so far it has remained accurate. I believe the shoulder bolt holes did not allow enough clearance for adjustment as they came from the factory. Reaming them ever so slightly has made the difference. I am pleased with the Simple Square and will use it whenever I need it. I will check it for accuracy before using but I am confident it will be fine.