There is no problem with .45acp Glock extractors, as far as extracting .45acp brass. Having fired a coupla-hundred thousand of my .45acp reloads through various Glocks, I can attest to that.
I can also attest that I followed instructions about modifying the .45acp extractor to accommodate the 10mm conversion, to no avail. Never could get sufficient extractor tension for reliable extraction. I'm guessing that Lonewolf''s refusal to make .45-to-10mm conversion barrels is because they had to deal with so many unsatisfied customers regarding that conversion.
I was one of the first customers of the .45-to-10mm conversion barrels. I am mechanically inclined and do just about all the work that's done on all my firearms. Also do all the work that's done on my vehicles, if you get my drift. When I bought into the conversion, I was assured that it would "just work fine, 100%." Then I was told a different story...that the extractor's front pad needed to be filed down, in order to extract the 10mm cases.
I spoke with several other suckers who bought into that same conversion barrel, and they had the same problems that I had and they similarly felt that they'd been misled.
I never tried the conversion on a G30; only G21. Finally found a good deal on a ln G20. Had previously found a great deal on a complete G20 upper, but let a friend of mine have the deal.