FWIW, you can change the ejection pattern on your HI-Pro DPMS, even without the shell deflector.
1. Pull the ejector spring out of your Field Repair or Spare parts kit (you should have one or get one, just incase you need a spare spring, pin, extractor or whatever).
2. Once certain you have the proper spring, using a pair of jewelers' dikes (small wire cutters) "snip" two rounds off the end of the ejector spring. (Note: do not bend the spring in order to snip off the rounds, best to have the right type snips which will allow you to clip one round at a time from the end of it, so spring does not get bent or damaged. Also, using a fine file or sanding wheel on your Dremel tool make certain you leave NO burrs that might inhibit proper function of the spring, make it as smooth as the original, which you will save should ya get carried away and snip too much off.)
3. Remove bolt and carrier from your AR.
4. Seperate the bolt from the carrier and wrap it carefully in a rag and place it face up in a vise. (DO NOT overtighten the bolt in the vise, just snug will do as you don't want to damage the bolt)
5. Using an expended round, have a friend or your better half hold the empty brass round in the bolt face compressing the ejector.
6. Using the proper sized punch (IIRC 1/16"), tap the ejector retaining pin toward the "bottom" of the bolt, note: it's not necessary to push it all the way out, just until the ejector and spring will come out.
(Careful as the ejector is under spring pressure and it'll shoot out, so release pressure on the brass case slowly and hold hand over it so it don't fly off!!!)
7. Remove the stock ejector spring and replace it with the "modified" one.
8. Replace spring then ejector and using the same expended brass case, re-compress the ejector.
9. As ejector retaining pin is still partially inserted, carefull tap it back in place and bolt mod is done.
10. Replace the bolt back in the carrier and both back in rifle and test your new brass drop location.
As most of us started with one round and ended up at two rounds off the existing spring I suggested you start with two. If necessary you can clip another, but only one round at a time until the ejection pattern is where you like it.
This process is referred to by High Power competitors as Potty-Training your AR and is the esiest method for changing the ejection pattern of your rifle.
Hope it's of some use,
Mike