The Microfocuser would assist with how you are currently operating. Keep a close eye on the star FWHM values as you shift through the CFZ. Pause when you think you're close, wait for a few more exposures to verify as seeing can mess values (and your mind
).
Generally speaking, the microfocuser is fine for visual use. However, if you're talking specifically about the Meade #1209 Zero Image-Shift Microfocuser, keep in mind the limitations. The microfocuser uses a analogue DC motor which is not predictable. What I mean by predicable is that they don't have a defined step size of movement (that is delivered by a stepper motor). For imaging you need predictability so that you can return to the CFZ time and time again. A digital reader on a stepper motor will tell you exactly where the focus travel is allowing you to either manually push buttons to hit the CFZ or computer control it the movement (preferred).
Software... Its difficult to go past FocusMax. Its free, device support is plentiful (considering it acts as an ASCOM hub/client) and is extremely accurate once you get things set up correctly based on your imaging train profile (which can sometimes be tricky) to get the right V-curve.
http://users.bsdwebsolutions.com/~larryweber/
The white paper is a good read in understanding its operation.