Travis, 10,000 to 12,000 RPM seems a little high for a 65 turn motor, at least to me. I've never dynoed one, so I can't say for sure, but I see quite a few 55 turn motors rated for 8,000 RPM at 7.2 volts, and a 65 turn motor would surely be slower then a 55 turn, wouldn't it?
Ed, you might want to look at brushless out-runner motors. They usually run a lower Kv then what the in-runner motors do. I have a couple 800 Kv out-runners in one of my rock crawlers, but I needed to have an adpater plate made up so I could mount them to standard transmission plates. Some out-runners have a standard bolt pattern, others do not. Sometimes a really low Kv out-runner will also have a larger then normal motor shaft. In my case, my motors had 5mm shafts, but I was able to drill out the motor pinions easily, and make them work just fine.
Rather then look at the Castle Creation motors, take a look at these.
900 Kv out-runner, with a standard bolt pattern. No reduction necessary. If anything, you could always gear up, if it is to slow. Out-runners tend to have more torque and can easily handle a larger pinion gear, without hurting the performance.
http://holmeshobbies.com/product.php...&cat=19&page=1
Here is a 1100 Kv out-runner, that also bolts up to anything a 540 can motor will. Standard shaft as well. More torque then the motor above, and a little higher speed, yet still very slow.
http://holmeshobbies.com/product.php...&cat=19&page=1
Both of these will run with any brushless speed controller you like.