I just removed mine back in February. The process took about 45 minutes. I have kept every stock part and was not going to cut the OEM knob.
I lightly warmed up the OEM knob with a heat gun then wrapped the knob with 2-3 layers of painters tape. The wife unit held the bottom (under the cover) with some locking pliers and I used an 8" Husky strap wrench on the knob itself.
The first 2-3 revolutions happened through brute force and multiple readjustments of the strap wrench. The rest were not nearly as difficult but it did take some effort. No damage to the knob but my hands were spent the remainder of the weekend.
