If you would like to add auto-focusing capabilities to the Founder FOT86 or FOT106 refractor, this bracket, along with the ZWO EAF, is certainly worth a look.
This bracket attaches to the underside of the focuser on either of the above telescopes and accepts the ZWO Electronic Automatic Focuser (EAF), which is sold separately. Instructions and hardware are included. See attached images showing the included components. The additional drawings show how the EAF would be attached to the FOT86 or 106, but remember, you must provide the EAF yourself.