Customised a Coolermaster MM730 with a 3D printed shell.
Had a Logitech G502 which was a brick at over 120G. The MM730 is pretty decent at 53g but the shape didn't sit nicely in my hand. Customised version is 34g.
Can't say there's a big difference between the 53g original and my 34g version but compared to the G502 it's so much better. Constantly found myself in games trying to micro adjust and with the G502 it took forever to move the cursor.
The MM730 has optical switches which are a little more clicky than the old G502 switches. In my customised version I replaced the switches for Razer ones but didn't notice much if any difference, perhaps a little easier actuation.