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.
