I installed the T-rex crash bars as well. The install was pretty straight forward, the only thing of note I guess is to remove only one engine bolt at at time (duh) and then torque back according to the shop manual, blue loctite every bolts. Everything was where it was supposed to be, didn't have to tinker anything to make it fit.
(2011 Versys) Installed T-Rex engine guard and front sliders that came with it. Pretty strait forward install but a few notes.
Instructions state RED loctite on engine bolts, blue on all other bolts. Loctite takes 24 hours to fully cure so best to not ride it during that time.
Allen bolts for the tube bracket clamps were a bit of a challenge to tighten, the engine guard tube is in the way making it difficult to use an allan socket or 90 degree allen key.
Service Manual states to tighten left engine bolt first 32 ft lbs then right side, not sure why this makes a difference but is specifically noted in the manual.
Left side is fine but fairing on the right side guard just touches the fairing, didn't notice until all done. I suggest placing a couple of strips of the foam that was used to wrap the bars between the guard and fairing before you tighten all the bolts, this should keep things aligned.
Overall really happy with the built quality of these guards, top quality hardware, everything lined up during install.