Wow. Does that bring back memories. Looks like a tail pipe view of a Blizzard from the pics. You could get by with a smaller servo if you have to. I think all of mine ran a Futaba 3003. But if you choose to stick with a 2075 theres no reason it cant be made to work. One thing glaring is you dont need all the goodies attached to the servo linkage. Get rid of the turn buckle on the rudder ARM. Yes it adds adjustablity, but you can compensate for adjustment on the opposite end. With the hardware you have mounted there doesnt need to be a lot of rudder throw. And at full speed you dont need a boat load. Maybe 20 degrees each direction? Depends on how deep the rudder is.
On the subject of rudder linkage, if you can, go down a size. Looks like you are running a 4-40 size? Dont need that. As short as it is, you can get by with a 2-56 size or a push rod in the .062 size. If that was my build I would install a push rod with a 90 deg bend on the rudder side and at the servo side put a threaded clevis going into the servo arm. You can glue down the 2075. Wont need a mount.
Have you settled on a power system? On 2S and a 6S 540 is the bomb and on 3S a 7S 540 is the alternative. A Neu 1506 is what I always wanted to try but decided to move up in hull sizes so that never materialized. A X632 is the ticket for that little rocket. Detounged, cupped and razor sharp makes for 60+ no problem. Mine did well with a Schulze 88WO and a Castle 120. YMMV.
John
Change is the one Constant
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