You're on the money with the FK2, the M42 whilst a good shape the holes are fucking annoying, the G102 is also good.
I had Viper mini, great mouse but fatigued my medium-sized hands cuz it was so small. Currently rocking GPW.
fellow fingertip enjoyer
you can't go wrong with zowie when it comes to grip
I like the viper mini for fingertip/claw grip. On the small side, and mostly comfortable. Side grips aren't as comfortable as other mice I've used, but the lightness makes up for it.
viper mini is really good for claw and finger users
played with viper mini for a while great mouse