The improvements are minor, but noteworthy, a few structural improvements in the wing and provisions for an optional  pop-off or pop-up wing.  These pop-up and pop-off wing options  allow for better dethermalization from those really hot boomers where just a pop up stab does not bring the model down fast enough. See details on the product page for the BOOMER MK II

News Flash!
Clint Brooks flew his BOOMER to first place at the  Issacson Winter Classic on February 7, 2010. Conditions were marginal, i.e, the contest director chose to continue with 2 minute maxes rather than go with extended maxes for flyoff flights.  Clint outlasted the field by posting 10 2-minute maxes for the win. 

click HERE for details and other BOOMER contest wins!