I did the same exercise yesterday evening regarding Neptune and Uranus after than the 4-5th observations.
The Neptune feature was at near the limb rising faint still at 20H50UT, still but fading at 21H30UT then not catched after 21H45UT.
Tansparency was 5/6 due to moisture in atmosphere and the presence of an almost full moon glaring the sky.
Any way this present report performed with the 280mm Ultima and 470x, the observer being under a black curtain canopy to prevent parasitic lights.
Regarding Uranus there was some brightenings noted essentially at near the limb of the planet noted with the use of a W12 filter.
Nothing more except adding the fact that the banding structure appears well at 400x with the 280mm.
The session was stopped by the presence of sudden thick cyrrus clouds on the area that cover at final fully the sky.