This is off subject, but have you ever tried or thought of the Epic by Areobie? It's a love it or hate it disc, but I've seen some crazy long thumbers with it. It's a trip, it starts out like a thumber then ends up flat and fliying like a back hand throw. Seems to be the ultimate thumber "driver"
I actually have one and am in the middle on it. just havent perfected my throwing motion for that yet. its waaaay beat up from smackin trees. hmmm. i guess ill try it out next round. i like havin a disc around that i can thumb short. i miss my destroyer cause i could park my second shot with it lol.