M65 and M40 thumb buttons

Hey guys,



I recently bought an M65, but returned it the very next day due to the horrid tracking/floating. Another problem I had was that the thumb buttons wouldn't register if they were pressed at exactly the same time.



Apart from these 2 issues it is an absolute gem, so I've been looking for something similar. I've come across the M40, which uses the 3090 sensor.



Can anyone out there confirm whether or not the M40 has the same thumb button behaviour as above?



Thanks