I could never thread silica in any form. It always frayed too much, and I would cuss like a sailor each time. Rayon not only works better (better flavor, TH, nic buzz, longevity, etc.), it's also the easiest thing to wick - even easier than yarn, which didn't work as well anyway (but worked better than silica IMO). Just tear a little at one of the ends and it twists to a perfect, firm point every time. The only tricky part about rayon is getting the right density - can't be too tight or too loose. That's why you read about people sliding it back and forth to feel for a "squeak."
If you must wick with ecowool and it's the hollow kind, I suppose you could just find a skinnier mandrel to slide into it, then wrap your coil around
that. That would keep you from overtightening your wraps around your wick. Then you can just slide the mandrel out after you've tightened and trimmed your coil legs. You need super sharp scissors to trim wicks, otherwise, you just end up tugging them out of the coil. Read back a little bit in this thread (or thread search "scissors"), and you'll find some suggestions of what to use.