I was thinking this myslef. I also wonder what answer you'd get from QA1 if you asked about this issue? I called them and asked alot of questions before ordering mine. I haven't instaled it yet. One thing they did say is the product was redesigned and is now made to their specs with their quality control vs. CAP's.
Speaking of RMS. I called him to order upppers. Told him I was using Qa1 lowers and Qa1's kmember. He was familier with the product and didn't have anything bad to say about it. While an alterK would be my dream. 1,000 vs. 5500 is a huge gap.