I too got in on the 10 servo deal; it was too good to pass up. I just hope that the servos live up to their billing. The output shaft on the HD2250A is definitely larger than the Futaba or HiTec‘s shaft. I tried some Airwild JR arms that I had and they wouldn’t go on. The MPI arms that clamp on the output shaft look like they might work though. MC, what brand JR arms did you use?
Since I had some 12” 22ga Futaba servo leads on hand, I decided to convert 4 of the HD220A servos over to the heavier leads. Note: You will definitely need a low wattage pencil type soldering iron with a fine tip. It wasn’t too difficult, as I was able to do a credible job by hand on the first one, but since I had potentially 9 more to change I decided to make a simple jig to do the others. If anyone is interested, I’ll try to post pictures and a drawing of the jig. The jig definitely makes the process easier. It occurs to me that there is an added benefit to doing this; as you can now make the servo lead any length that you want, there by eliminating one connection and its associated voltage drop!
(More delivered voltage = more power.)

Robert