DZ,
I do not doubt what you say, the majority of the ones I have from Grizzly and the others are 10+ yrs old and look identical to the CDCO ones I have, the only ones that are different are the newer All industrial sourced #250-101XLs (5/8” tooling in an AXA block) and the 3, I have from Dorian and the 4, I have from Aloris. Since I have not bought from anyone else recently (except the #250-101XLs) for the last 10 yards or so, have all come from CDCO.
until your post I did not know the Shars and other ones were different now. How so?? Are they longer, higher, wider??.
About 8 yrs ago now, I ordered a box of 500 of the 8 mm x 1.25 mm x 20 square head, full dog point set screws to replace the ones that came in the blocks, the kid at the supply store entered the order wrong and I ended up with 5000 of them. It was going to cost the supplier almost the entire cost with restocking and shipping, to return the extras, so I ended up buying them at cost. I sold off many of them, gave some away and still have an adequate supply for my self.
I started out with a Grizzly QCTP, the piston type, later changed to a Phase II wedge type, happen upon a deal for an Aloris tool post and was quite happy, then with a work bonus burning a hole in my pocket, and a 25% off coupon from Grizzly, I bought a Dorian, stated to have the “New and Improved” wedge design. I sold off the Aloris and kept the Dorian. I’m still not sure if the actual performance between the Phase II, the Aloris and the Dorian was all that great, the fit and finish on the Aloris was miles ahead of the Phase II and the fit and finish of the Dorian, is a step or two above the Aloris, whether any of them worked any better is still a subject I question.