The only problem with the heat sink cases is they weigh a lot.
For 1/10th sedan: If you are buying a new servo, try the Futaba S9452. If looking for a used one then look for the S9451. They are basically the same, but the 9452 is smaller and lighter.
The airtronics 94357 is a good servo also as well as its heat sink case version.
With a steering servo (lay down) I have always been concerned that with an aluminum case the heat sink might work against the servo. If it lays on the chassis, and the chassis warms up, the servo case might be a heat sink for the chassis instead of the other way around. All I know is I have never owned a heat sinked version of my servos and so far I have not had a failure. The futaba digitals are good servos, and the pricing at Tower Hobbies is very good compared to their competition.
Watch out for the coming S9551!!
Last edited by Scott Fisher; 12-15-2007 at 02:28 PM.