I've used Futaba 3004's, 3152's and 3010's The higher torque 3152 and 3010's came with came with 4 rubber grommets that push fit at each of the four mounting lugs. The lower torque 3004's also came with 4 grommets. Each had 2 holes side by side, with one fitting on top of the servo and the other underneath, two at each "end" of the servo. They are a PITA since neither will stay in place until you get the eyelets pushed through.