Ok , so here's my 2c worth.
In the above photo, I can see that the inner part of the forward k frame mount is not welded. The shock mount looks to be made from multiple pieces. And my biggest reason, hopefully corrected by now, was that QA-1 is a new company formed when Cap Auto bit the dust. No way in hell would I ever buy anything that was made by Cap Auto. I saw first hand their quality. I know a lot of members use QA-1 now so they must have improved their quality.
HDK or RMS for me .
