Dunno, about sending to Blast, but the guys over in the Timmy section are always talking it up. Personally I sent an e-mail a week or so back and haven't heard back.
My D2 was giving me similar fits and what cured my ills was replacing the o-rings (found kit on e-bay) through out the rammer/assembly and lubing it up good.
That would be the first thing I'd do. It's also the cheapest place to start.