Had a G304 for ~3 years, it’s developed quite a bit of double click over time. I replaced the switches for Huano pink dot blues, and it worked fine for a while, but the middle click also started double clicking eventually.
I’ve now replaced it with a MCHOSE G3 V2, and the initial impressions are great, with a much lighter build and a built-in rechargable battery. I haven’t used it long enough to know if it will double click, only time will tell if this is just more of the same.