yes -my experience is pretty similar to Marcs. i aim for about 1 min per channel on Jupiter at high frame rate. note that i have to manually change the rgb filters (via a filter slide). if i had a osc i would probably go a bit longer like 90secs.
winjupos does a pretty good job at de-rotating jupiter but it does take a bit of finesse. (also very handy for those with Alt-Azi mounts/goto dobs and mono/filter imaging).
saturn i go a bit longer up to 2min, Mars i think you can go as long as you like with it's relatively slow rotation period (with pc storage being your limit).
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