Viridian reactor 5 gen2 - Viridian Weapon Technologies Reactor 5 Gen-2 ECR Laser Sight With IWB Holster

Hi,
Bought the viridian reactor 5 gen 2 for my Kahr P40.
Mounted it, the 3 screws are self tapping, you have to unmount it to change the battery, I invision the screws stripping out the black plastic in the sight after a few battery changes. Boo... Next I tried turning On the laser with the on off switch, you have to press it 5 times or so to get it to turn on, if you used the switch to turn on the laser when you needed it for self defense, well you would be pushing up daisy's from 6 feet under, boo... Once you got the laser on using the intermittent on off switch, the directions says to put it in the supplied holster to turn it off, in the instant ON mode, doesn't work, the position sensor works off of a magnetic disc sewn to the holster next to the muzzle, it doesn't work, the magnet should be next to the laser for the instant ON to work.
It is a nice bright green laser! Not recommended! Returned for refund.