Yes David was giving a talk on the subject so i sent him an early copy of my method, i must stress that to be successful with this method you should swing the frames up and tap off the bees in an upward motion to get them flying, to shake them onto the floor would be counter productive, we have not found any problem using the original Queens, but one reinfection could be explained by this, having said that this colony went on to be one of our best Honey producers that season after a repeat use of our method. The Bee unit suggested that Buckfast`s show a tolerance to CBPV sadly this is not the case as i have had both Carny`s and Buckfast`s go down with it, the only common detonator is the size of the colonies, having large colonies combined with inclement weather around end of May beginning of June is when you get a problem, i have seen the early signs in a colony already on a previously unaffected site, just two workers that looked different, more colour than the rest, and a little polished so i expect it will rear it ugly head again this year.