Mis-drilled 6B8-2 and had to make both brackets over. Drilled, trimmed and Installed 6B8-6 Upper bearing. Laid out lower bearing but didn't cut yet. Still haven't heard from ZAC relative to 6B8-1 gussets. If I don't hear from ZAC I will cut down the gussets to butt with 6B8-2 and install them. The original had much smaller gussets so this will be stronger than the original. ZAC beefed it up to allow for training in the XL.