Hey all,
I lurk a lot and rarely post back but this forum is spectacular so here goes.
I too do not want to mess with vacuum pumps an the like. But will if it means a more pure end product.
Please check out my method, this is pretty much my 2nd time using real flowers. Tested always with AVB for ejuice fail fail etc.
I have to say, I'm confused as to why one would bother with solvent techniques like this, especially when running such a small amount of flower. Rosin is far more effective of a technique for your needs and you won't end up with sparking butane soup at the end. You'll get noticably tastier medicine quicker with less risk.
I mean absolutely no antagonism here man, we all started off making earl in similar ways and fought off residual solvent issues back in the day - however for me at least, this was before rosin was a well-known option.
Get some parchment, a straightener and a vise. Squish small .15g-.3g nugs with as much pressure as you can bring to bear at the lowest possible temps on the straight iron. You'll have better tasting oil quicker, not have to use any solvents at all, not have to clean anything afterwards, not have to worry about risks of fire or explosion and especially not have to worry about oil sparkling and giving fireworks when you dab it. You'll be able to process inside without ever going outdoors and you can easily have the same yields.
Solvent extracts do of course have a place, by all means - but that place is really limited to mass production scenarios.
If your oil sparks and tastes bad, IMO it really can't be regarded as being 'purged ok'. Strictly speaking, to purge entails COMPLETE removal of something! Elimination is the key synonym here.
Of course, most of the greatest solvent extracts will have very small, trace amounts of residual solvent (in the PPB or PPM range depending on the solvent) in order not to undergo significant terp loss to eliminate the final trace residuals. None of these best-in-class solvent extracts will spark or taste bad though. All of the best extracts made with solvents by dispensaries are lab tested to confirm the amount of residual solvent.
Have you tried rosin technique before? You will be amazed at the difference in quality and the speed with which you can produce this better quality extract!