Boxer window lift cable replacement

I have a partially frayed cable on one of my door lifts for the Boxer and I assumed it whould not be too difficult to replace. The problem is the disassembly of the actual spool mechanism. I need to have access to both sides to route and secure the cable and i don't see an obvious way to remove the winding drum from the worm gear drive. It looks like it should separate and slide off the shaft seemingly parting where there are toothed connections. I tried gentle persuasion but am reluctant to be more aggressive if i am missing something obvious.
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After more searching i found the reasonable solution. Linked below.
It seems that there is no disassembly option and the cable replacement is a bit of a hack by routing both cable ends to the front of the spool.
Should work, I'll do it tomorrow.

http://www.birdman308.com/service/windowservice/index.html#step8