PFM Mark 1 slip cover worries me

[lowks]

I finally got my PFM Mark 1 fountain pen and everything is just hunky dory and the pen writes like a dream. The only thing that worries me is the slip cover is rather loose and can get easily disloged. Is there anyway to tighten it ?

[jar]

Yes, you need to tighten the clutch ring. I have also wondered if a clutch ring from the first Legacy version would work.