The previous builder of my RV-9A partially complete project really buggered up the location of the HS mounting tabs. It looked odd attached to I verified with a digital lever that when it was mounted, it was 3 degrees off from being level. I ended up having to drill off the mounting tabs, then fabricate new ones and drill and rivet so the HS was level.
RV-10: #41686 Under Construction
RV-9A: #90949 Under Construction
RV-10: #40637 Completed/Sold 2016
Cozy MKIV:#656 Completed/Sold 2007
"Donor Exempt" but donated through Dec. 2021