I used to own a 12" LB.From my experience a Telrad is a must for a dob. Alignment is easy with the 3 thumb-knobs very sensitive. The RDF you have I found it very awkward to use: its heavy and need Allen keys to adjust up/down & L/R. Dropping of tool and scratching of equipment is common place. I prefer the cheaper and lighter version
https://www.bintelshop.com.au/Images/Stock/6888X.jpg which has 2 dials for easy tool-free alignment. Still the projected red dot is often too bright and obscuring the object you wanted to centre.