So the main difference between RSO and these QWISO (quick wash) extraction methods is the length of time you leave the solvent and leaf material together before straining. Longer soak times extract much more waxes/lipids/chlorophyl/etc which is why RSO is so runny and often dark green or black in color. Rick Simpsons original recipe didn’t use isopropyl. I actually used to know Rick and he told everyone back then he used kerosene for his method but confirmed later on he used naptha in the original recipe. Soak times vary from 15 minutes to overnight for RSO.
Of course shorter soak times will result in a product with much less contaminants, but a significantly reduced yield. I find 30-45 seconds to be a good starting point with methanol and 45-60 seconds with isopropyl. Isopropyl will give you the cleanest product, but methanol will give you more yield/return.
Just made this 2 days ago, sorry didnt have a pic of it all collected but the color is good as you can see. Input was a full quart jar of trim and larf from last grow. Got about 2-3g out of it and it tastes and dabs great.