Edward I found double nutting the studs, Two long 6 point wrenches, taping on the end with a small ball peen hammer, a heat gun and lots of patience the studs will come out. They will twist some, the trick is to know when to stop turning and go back to heat and tapping.
I got my cl100 parts and soon I'll need to understand what's this "how many kicks" thing, they young guys speak of,