Trijicon quality function - Trijicon HD Night Sights for 1911 Novak Cut

This is the night site that I used to replace the Novak sights that came on the Ruger American Pistol. Only a little amount of adjustment was necessary to install the Trijicon Front and rear. The only issue I have with this unit is that it does not come with a set screw for the rear sigh. The Novak rear set screw is too large. When I requested an appropriate setscrew from Trijicon, the reply was"At this time, we do not provide, nor do we even inventory, a set screw specific to these sights (the hole is part of the print and these are machined out of house), and it should not be needed with correct fitting. Should you require the screw, it is our understanding that it accepts a 5-40 x 3/16 SHSS. Please contact us if we are able to assist in another capacity.
Respectfully, EL, Trijicon Customer Service" Which to say the least is that if a set screw is not needed then why machine a part for one? This is all a mute point how ever if you have the part installed by a competent gun smith.