Got it ... this part takes a LOT of working ... hand pressure on my fluting tool didn't do it. I had to apply pressure with the fluting pliers, then use a rubber mallet to get enough depression. Even using the rubber mallet probably need to double up on the flutes so they aren't so deep.
Had to order replacement part, fluted the other direction twice working it so concerned this part may develop cracks later.
#140376 RV-14A QB IO-390 Thunderbolt
Last edited by bkervaski : 10-04-2017 at 05:30 PM.