I was very unhappy with the tone this banjo...lots of unwanted overtones that disturb when playing on the second half of the fingerboard. I tried replacing the strings and the bridge with no results, then I fitted a Gillette mute with scarce improvement. My next step was to remove the resonator, with a good result. Finally I discovered that some cheap silicone-made mutes for drums work good also on banjo: you can place them everywhere you want on the head: any different position can create different effects on the tone. In essence I solved my problem by putting on my banjo one Gillette, two silicone pads and reso removed. I attach here a short video where you can see the two oval pads, one down beyond the bridge, the other under my right hand.
Mike, I've tested almost all measures and all brands. Apart from turtle ones, that are off limits, I used the Fender "medium" for longtime. Unluckily they get worn out so easily in my hand, cause I use to hit the string at a wrong angle, that quickly spoils the pick. Recently a friend suggested me to try the Dunlop .73: they provide about the same tone of the Fender, but they are much more resistant. P.S. I played with a Fender "Medium" in that video.
The so called "Gillette" mute is a kind of mute which has nothing to do with the banjoist Bob Gillette. I guess that name is related to the "Gillette" shaver. (I enclose a pic of that mute).
Many years ago a friend of mine came to UK; I asked her to buy two G-mutes for me, she found them at a music shop with no problem.
The 4 string banjo is an almost unknown instrument in my Country, even among musicians...sometimes. Somebody from the audience asked me "What kind of mandolin is it?" or said "What a strange drum!" etc.