I installed one on mine. I couldn't raise the shaft up as high on mine as Omeys info said I could. There is a metal piece over it in the way.
I had a friend with a blind tap that let me tap the hole without damaging the shaft.
Clay (WA5NMR), Lee (Wife), Katie & Kelli (cats) Salli (dog).
Fixed domicile after 1 year of snowbirding and eleven years Full Timing in a 2004 Winnebago Sightseer 35N, Workhorse chassis, Honda Accord toad