Welcome!...From Phoenix as well. I have a side mount from Laserlyte on my M85 which I really like - I believe it will also work on the 66.(they have two different mounting plates) Check the Laserlyte website to confirm.
Glad you like it! I had to get used to holding my trigger finger a little lower to keep it out of the way of the beam, but for the money, I think it's a great little laser.finally got the laserlyte side mount in the mail and slapped it on this weekend. love it - easy to install, works great and about 1/3 the cost of my last CT grip. good suggestions!