Last night I tried a few different filters #12 Yellow, #23 Orange, and # 80A Blue. I did see some differences where I saw more of the polar caps with the Orange and Yellow. The Blue I felt was too dark and limited my seeing. I tried many different magnifications from 133X to 240X and even push higher last night. However, it didn't seem to show any better detail about 240X was the limit.
On the May 1st sketch I could see some reddish detail on the edge of the planet which I added to my sketch. Also Ganymede is shown on the edge of the sketch.
I also got a chance to view Saturn although low it still showed some shading on the globe which makes me think my time sketching is paying off. Last year I just saw Saturn as one color with the same scope. I could also see Cassini's division easily.
April 30th Sketch