I know the "drum police" will probably get on me for this, but I think I finally found the answer to my tuning woes...I decided to remove the reso heads and hoops from my 3 ply Slingerland toms (13, 14, 16). The notes I am able to get them to are now so much clearer, without all the overtones from the bottom head interaction! Yes, they did lose some resonance but they actually have a cool barking sound to them now (from behind the kit) and seem easier to lay into now for some reason. I'm not sure how they will sound live though from the crowd's perspective. Even though it's out of style so to speak, is it really inconceivable that they won't come back? After all, double headed toms were around way before the 70's.