Drill new b-model wing attach angle blk. Hole in spar (spar only, not attach angles/blks) slighthly enlarged due to different alignment of old and new blocks, Sonex verified acceptable as long as wing attach block wing pin holes are correct (per plans). Blks verified drilled correctly, Pins installed. New blks are one piece vice multiple piece, allowing for larger 1/2" pin vice 3/8" pin. Also rough cut new root rib attach angle.
