FWIW, I tried boiling my flask directly on the stove, and it was a big mess when it came to adding the DME through the narrow opening (DME tends to clump/cake immediately when exposed to moisture, including hot steam).
The Fiesty(sic) Goat Brewery est. 2007 & Clusterfuggle Experimental Ales est. 2009
Planned: sLambic II, Flanders Red II, Orange Blossom Mead, Fat Man Porter
Primary:sLambic I, Janet's Brown
Secondary: Toasted Caramel Port, Flanders Red
Kegged: Hefeweizen, Centurion Falcon IPA< Dark Saison
2013 dump volume: ~2 gallons