You can extract by oil or alcohol with a Magical Butter machine. Its the best money I've spend for doing this. Its a bread machine for weed! dump in the weed, ad oil or alcohol, set the temp and run time.........done! You don't even have to chop your buds or trim, it does that too! I recently made both WISO and QWET using my machine to make the solution. I make coconut oil for capsules with it regularly. I wouldn't go back to the hand method for anything!
Also, THC is usable by the body whether decarbed or not. IMO, the best oil will be a blend of both.
And here's a decarb chart based on science. Most people are doing it wrong. THIS will help you make POTENT oil, believe me!
if your decarbing in an oven, 27 minutes at 250F is all you need. And look at the chart, below 200F it would take days to decarb, so no, cooking at 170-190F won't decarb enough to say so.
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