Just did it this week!
Installing a Trutrak, for a buddy, in his RV-4. Rubbed the skin off of my elbows and knees. Installed the Pitch and Roll servos per plans -- the pitch servo is a bear to get to. I drilled out the rivets and installed the new brackets using -3 bolts. I am 77 yrs old, and yes, it is a nasty job, but I suggest you install per plans, rather than trying to reinvent the wheel.
Working on the wiring now.
RV-10 Co-built (sold)
RV-8A Maintained and flown (Sold)
RV-6A Bought and Flying (N177RV)
Very Happy Contributor
Based at KCLW (Clearwater, FL)