I think I just got a sign from God that this gun was made for me...I ordered a set of Heinie Ledges from Amazon (from Heinie's web presence there of course)...
The rear sight, I had heard they were EZLocks now, so when that one just slid in the dovetail, fine, I was half expecting that.
But the front one slid in like this was the mold gun for it; a slight tap, a nudge, and it was perfectly centered. Didn't need to use my sight pusher at all for either side and I've never had a set of Heinies drop in on any gun I've ever had them on, including a handful of other HKs. The 4 or so other sets I've installed, all needed my sight pusher and a whole lot of elbow grease and fitting.
Hopefully tomorrow I can zero it and lock it all down. So stoked that this didn't turn into a file/fit/file/fit/repeat for an hour project.