Sanwa 141 is the same family as the Airtronics 94141, 94142, 94143, 94144, and 94145. The 94145 is .07 sec time to rotate 60 degrees at 6.0 volts. The 4.8 voltage transfere time is .09 seconds. There are NO other servos out there with those specs.

They are heavier and little bigger than the JR, but they still fit the car and don't weight it down.