I use a G703 from 2018 and it has that dreaded scrolling wheel issue, which is now getting to the point where the scroll wheel is unusable. Tried updating the firmware etc but no luck. Am I correct in saying that the 502 has the upgraded sensor over my G703? I've always used Logitech in the past and they have been great, but hearing about the whole double click issue with these and the issue I have with mine, it's starting to give me doubts.