The gear puller method can be found in the Spider FAQ sticky at the top of the Spider section. You can use a 1 1/2" inside dia. pipe cap and a 2 arm gear puller. Drill a hole in the top of the pipe cap to accept the end of the gear puller center screw. the pipe cap push the old mount out and then the new mount in. This can be frustrating as you'll wish you had 3 or 4 arms.