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I would use a couple of hundred steps of backlash, set so that the backlash correction occurs when the focuser is being racked out, not in, and then if you can, make sure that the focuser travels inward when making the final move (With backlash accounted for it does not really matter, but it can make it faster by avoiding extra backlash moves)
Is your average focus position for any given filter/configuration stable step count wise, or is it changing? If it is changing, something might be slipping in the focuser train and all bets are off about focus quality in that case?
Second question, without wanting to start an argument (So I am not going to mention the package) a friend grappled with focus issues for a long time which turned out to be the focus routine in the software he was using, which was not well written. It took quite a while and you could even see the software determine the "Best" position, which it then ignored and the last part of the routine was to move out form that point and then step inwards towards focus taking focus shots as it went. The first shot where the HFR went up, not down it would go back to the position before that shot and stop there regardless of where the best position previously found was. A momentary change in seeing as it worked would often have it land hundreds of steps out of focus and it did it over and over again. Very frustrating.
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