Installed the pitot mast on the left wing. Took some time to cleco the bracket in place inside the wing “in the blind”. Used some RTV to seal the mast to the skin and reached inside the access hole to rivet the mast and bracket to the wing skin and rib. Hard to find and buck the rivets from the access panel as well. All in all it turned out ok and didn't have to drill out any rivets. Used pull rivets to secure the bracket to the near rib. There was just enough room to get the rivet puller inside the wing to “pop” the rivets. Installed the pitot tube for fit and remembered I needed to tighten the fittings to the aluminum tubing. If I had to do it again I would not have placed the pitot so far outboard. It's been a pain trying to do the installation from the nearest access panel. Still need to figure out how to secure the wiring and tubing inside the wing. Tightened up some wiring zip ties in the back of the fuse in preparation to finish that up.