gibran2 said:
With the machine, spice is exposed to direct flame....
Sorry, but this just simply is not true in the case of "the machine" when designed and used in the proper manner. Whatever variation is used, if it is to work how "the machine" is meant to work, the spice is loaded into the side of the mesh plug opposite from where the flame is to be applied. One can burn the spice with shoddy design or improper technique due to over-heating, but
no device SWIM's seen yet is without its share of discrepancies, even the GVG (drippage being a major one). The fact of the matter is, that with a little ingenuity, the flaws of any method can be overcome with a bit of ingenuity.
SWIM happens to believe that the VG may be accomplishing a very simple task with a slightly over-complex and pricey method that may not be the best suited for certain substances, and while this may or may not be the case, it's certainly worth his while to try his hand at improving upon it. Sorry, but when SWIM considers how far he's gone with the tiniest of devices, then he looks at a GVG, it seems so bulky and cumbersome. However, he must iterate that he absolutely adores the glass-on-glass joint and the porous ceramic filter of the GVG.