Alex. thank for explaining some of the concepts.
If S/N was important, with hind-sight i would not have used a red filter. Of all the observations i count 5 instances of the use of an R filter. My data seemed OK (the READING light curve), but might have been better without the filter. The logic was to improve the seeing and so the resolution planet/moon.
I made some rough notes which were useful to me at the time, but some of links are now unavailable. On the whole i believe we followed most of the good advice that was on offer.