Considering purchase of focuser for EdgeHD 9.25. What am I giving up if I choose Motor Focus Kit Zero plus Ultimate PowerBox V2 rather than Focus Cube Zero? Hand controller and temp sensor? Anything else? Unity platform?

My Ultimate just arrived minutes ago and I installed the dovetail brackets according to the instruction sheet, but I must be missing something. How ever are they going to grip on or engage with anything? I need all sorts of additional brackets to fasten it to the top dovetail on my EdgeHD 9.25. Gues...