I have some serious issues with the STC and the actual impossible legality of installing on PA32 stabilators. The gap seal ads 8" of aft CG and impossible to add enough weight to bring it into balance. We would need just under 1 lb of weight added to the counter balance in addition to max plates. That's insane for an STCed product.
With the seals and paint, they are .45 lbs. the raw seals are .4". That's just way too much weight added too far back on the control surface. Even if your stabilator shipped with no plates, adding max plates would bring you in close to maximum aft tolerance. Piper shipped a large swath with at least 3 plates or more. My had 4 from the factory and was 36.8", just barely legal with no speed mods installed. With the gap seal, we were at 45" aft.
I very seriously question any PA32 stabilator gap seals current installed. The STC requires a rebalance, but I highly doubt most are actually done. It's way too much work(read $$$) and blown off.
Bottom line, there is no possible way this peticular mod is legal or safe based on our findings. It cost me well over $1k to figure this out and I'm fucing ****ed.