So, for what it's worth.....The Shield RMS, Shield-JPoint., and Shield RMSc all have the same mounting pattern; which is the same as Leupold DPPro.
Here's an image showing the Shield RMS on the Leupold p/n 170903 CZ-75 mount which gave me a chance to try a RDS on my P-01 without milling.

I like this setup so much, and based upon Bpnkrtn's encouraging posts..... I just sent my P-01 slide off to Primary to mill for the Shield RMS and Cerakote the slide Titanium color.
I did ask them to mill 1/1000 or so bigger in case I want to put an RMSc on instead and use the RMS elsewhere. They're supposed to be identical except the RMSc is .095 narrower; that's less than 1/8" but I suppose it might match the slide width better, but I do like the battery drawer on the RMS.
We'll have to see. Images to follow when I get it back from Primary.
Thanks Bpnkrtn for starting this Post! -Vinny