Sab, that is a really good sketch, mate. Very nice observation of Jupiter. I really, really like the 8" f/6 scope combination for the planets. Not too bright to create too much glare, and big enough to be able to rip out a lot of detail. I haven't aimed my scopes at these targets yet this season. You've managed to score a very good night for some real high power observing!
To see any type of detail on Uranus, I would imagine you would need to be at a very high elevation, and have very good optics at your disposal. Not an object that would reveal too much anyway from our vantage point. At most, faint variations in the light and dark cloud formations. But Titania! Way to go again, Sab! Your next sketch should be two of Uranus, showing Titania in different locations around the green giant,
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Have you tried for Neptune yet? I've seen it once through an 8" f/6 dob. Not much at all by way of a disk, but its very distinct blue colour is its real give-away.