Well kiddies, I'm at it again.
A couple of daze ago I took what remained of the Sweet Pink Grapefruit (15gms) and made some oil (slightly over 1gm).
After letting the oil sit for 20 minutes in hot tap water, I placed it in a preheated oven (100c) for 5min. I removed it and worked it for maybe 2min, about how long it took to start becoming thick.
While I was working the oil, I raised the temp. to 130c. I did this because I thought the temp. was too low, the oil wasn't the consistency I wanted.
I put the oil back in the oven for another 5min, checking every min. to ensure it wasn't too hot (smoking hot).
I removed the oil from the oven and scraped it onto a piece of baking paper, and worked it for a couple of minutes. Once the consistency was such to where it became futile to work, I placed the oil in the freezer (-5c).
After 2hrs in the freezer, I removed and placed it (oil on baking paper) on a piece of aluminum foil and then on to a stove top burner (set at 1).
Once the oil reached a working consistency, I worked it for about five minutes, noting extremely small bubbles bursting at the surface. Once again, time for the cold locker...

Same steps - 2hrs, then remove; work it for about 5min, then back into the cold. I did this process 10 times over two days, noting different things such as the surface explosions (I used my hand held microscope and observed the oil at 30x, 60x, and 100x), and how over time the oil was becoming much darker, but not a burnt darkening, something else...
Just before I wrote this I finally took a sample to the oil and put some real heat to it. All I can say is wow, definitely a HUGE difference when compared to what I had processed the first three attempts at oil making. The taste is unique, (sorry I don't have the descriptive talents as geekymonkey), there is NO residue to speak of, and the FX are clear and up.
Thanks to USBL for sharing some of the techniques for producing quality oil.
Happy concentrating...