Tonight I finished up the anchor blocks for the sliding canopy frame.
Learned my lesson from when I did the right side block--hard mount the block before drilling for the pin or be ready to make adjustments. After mounting it to the longeron I went ahead and did another wooden block for a trial run just to be sure I had it down. The block worked well and I was able to drill the UHMW block using 21deg down and 5deg in. Easy--when you've made a dozen or so practice blocks!