When I ordered electric pitch trim, long after purchasing the empennage kit, it looked to me like neither of the 2 different control arms (1 for manual trim, and one that came with the trim kit) were correct for the RV-8. I emailed Van's with pictures. It took a couple of days. But, they emailed back to say that neither of those were correct for electric trim for an RV-8. And, they shipped me the correct one, free of charge!
Mount Vernon, WA
2018 VAF Supporter