The Vita-Mix does not heat up quickly its the RPMs that eventually makes it heat up. Anything will heat up when it is allowed to run for a while. There are lots of tricks for making Nut Butter, like using Frozen Nuts or letting it rest in between. You can also start them in the Food Processor and then adding them to the Vita-Mix. I don't make Nut Butters, I enjoy the Nuts by themselves to Much.
I have both blending Jars but only use one. I find the Wet Jar works fine for all My needs.
Certified LIVING ON LIVE ,RAW FOOD Chef...........
Our PLANET is so Precious. God created this and its up to us to respect it. Did you know the Water we use today is the same water Moses used? RECYCLE everything you can at least once.... Let's keep this going...........