Caution if for 3.5 in prodigy - Crimson Trace CT-RAD Pro Reflex 1x 5 MOA Red Dot Sight

First of all, Optics Planet is 5 stars as always.
This sight is listed by Springfield Armory as compatible with the A13B plate that comes standard with the 3.5 in Prodigy. Crimson trace also says this sight is compatible with that plate. Indeed, the sight fits the plate, and CT ships the sight with 4 pairs of screws. The problem is that the screws don't fit. I contacted CT, and they recommended that I buy the correct screw from a 3rd party. No info from them about which screws to buy. Fortunately, I was discussing this with a range officer at a gun range I occasionally frequent, and he looked it over and told me to order 6-48 screws. That did the trick.
I would also note that the dust cover for the sight won't fit between the CT sight and the rear sight of the pistol. Fortunately I was able to do "surgery" and remove the rear "wall" of the dust cover. Problem solved.
The sight works, but this was all harder than it had to be. CT should add a 5th set of screws!!!
Once again, though, Optics planet is great to deal with.