OK. So further correction on the B24. We had recently the Bristol 50th anniversary, and according to Clint Pearson and others from the factory, the ballast was indeed 3000 lbs, not 2000. The flyer was a misprint according to him - it never had 2000 ballast, so your original information was correct. We do know that it is the Sailstar models that used concrete, and that the Bristol models used lead.