Anyone running a Stree/Strip 9 1/2 Dynamic converter

I have an original Dynamic, when Frank was in New Haven CT, and 2 customers of mine run the 9 1/2 convertors. In fact, Sean just turned one around (lowering stall and tightening it up a lot) in under a week. Very nice guy, and the convertors just plain work. It was pricey tho. The original cost of the re-stalled one was $650, and the new pump shell and stall adjustment was $350 more, plus shipping...