I drilled and installed the three flap bearing blocks. It's a little tricky getting the steel tube with the end blocks in position to match drill. Got it done and then located the center bearing block. Drilled through the floor and associated rib, then installed nutplates beneath. I struggled with the position of the center block, because the callouts for the length is misleading on the plans. Got it done and all is fine. Added a set of washers between the cut to make up for the removed material to maintain the original hole sizing and to prevent binding.
