This kit was my mod from the push-to. The install is pretty straight forward. 1 1/4" hole for the altitude motor gear, gives some up and down play. One 1" hole for the electrical and telephone plug. Drill and tapping the bearing mount is pretty easy. I ordered a metric drill bit and tap set. I did sand down the bearing mount top corners. Now all I need is power (coming today) and a clear night sky.