I've talked with Steve (Satern) about this, and I know he's got something in the works for these guns. Part of it had to do with milling a hole in the upper receiver where the rear sight center post could nestle further down, and buy us a bit more elevation. He'd talked about milling new front sight bases as well, and altering the height enough to get us to 1,000, while still having some wiggle room for adjustment. The upper hasn't gone up to him yet, but I'll probably send it up to him after I get back from Raton the week after next. Don't know for sure what's in the works, but I'll be happy to keep you posted.
At this point, I'm just glads these things are coming together and starting to look like rifles, as opposed to just a box of parts!