Sounds identicle to our league 7-9 ,s rules.Pretty much the only thing the white hats catch is the blitzing and thats not all the time.I,am not real fimilar with Daves Wt6 ,only that it,s effective.Question, does your refs,also coach HS,and MS? if so like our refs they really stick to the state hs assc,rules, and they pretty much ignor our by-laws unless you have one of those coaches that start whinning when things aren,t going how they hoped and start dictating the by-laws to the ref,s..Hope this helps.