At one point I had two Waterford Paramounts, built within a couple weeks of each other in Jan '89, IIRC. The earlier one was a late Columbus skinny-tube, the later one an early OS-tube. Both bought/won on separate ebay auctions, from different sellers, so the production timing was completely coincidental. I thought it was cool having model changeover-cusp examples. It's been a while since I sold them---I liked how they both rode, can't recall if I perceived much difference due to the frame tubing.