Just wanted to say I did a google search as well, and finally after searching for nearly an hour, this thread came up.
I just got my stingray today, and until reading this thread, I figured mine was defective, or machined improperly.
I'm having the same issue everyone else is.....the button is real 'crunchy', and I have to push it RIGHT in the middle for it to fire properly.
This is my second mech mod....the first is a magneto with magnet switch...and the magneto switch/button is LIGHT YEARS ahead of this one......at least when comparing how they both function at the moment.
If I knew the stingray would have this problem, I wouldn't have ordered it.
BTW - Mine is from Infinite.
I've taken the switch apart about 5 times now, trying to find the culprit, and I noticed what another person noticed.
1) The end cap, and the metal ring that goes into it don't fit together tight enough. This causes a wobble, and I believe is part of the problem
2) the little anti-spin bullet that sits in the switch I think is part of the problem as well - it doesnt seem big enough.
I'm going to keep playing with the mod, and hopefully fix it....but as of right now, this is SOOOOO annoying. The switch on my magneto clone is PERFECT.....nice and smooth, completely opposite of this crunchy, awkward stingray switch.