Deep Sky Dad AF3 Astronomy Telescope Auto Focuser Unit.
The AF3 unit is installed on the Takahashi FSQ85mm performs peerlessly.
especially connected ASCOM to N.I.N.A absolutely no issues ~ and of course Zero backlash.

Having tried tested and used both the Primluca Sesto Senso and Pegasus Auto Focuser units the
Deep Sky Dad one is the unit that is a definate keeper.
however, as an appetizer here is the link to the initial worts and all installation  video enjoy  click me

From an astrophotographer for astrophotographers - affordable astrophotography gear. Developed to optimize the capture process. Striving for stress-free astrophotography sessions. Amazing equipment especially the AF range of Astronomy Telescope Auto Focuser Units.
(click image below to visit Deep Sky Dad)