Barrel cozy for Swift FX

I ordered one and tried it out last night. I liked the way it feels but couldn't seem to keep the fx from leaking. I fiddled with it for 15 minutes and could never stop the leak. I use a large pillow and the cozy seems to push the two cones closer together and I believe that is what causes the leaks. For those who use this set-up is there a fix for this problem?

I use the barrel cozy and have no issues with leak or the pillows but I use the XSmall and Small.

If you think the inner cones are being moved slightly out of position you might very carefully enlarge the opening in the cozy so that it puts less tension on the pillow neck. Tiny enlargement of the holes.

See this thread:

viewtopic.php?f=1&t=71644&p=660476#p660476

Thanks for your replies Pugsy and sleepingUgly. I'll get out my scissors and give it a go.