The Enve compression plug has a lip so that when it is placed in the steerer it does not slip down, but I can't track one of these down for sale in Europe. Are there any others to a similar design with a lip? Thanks.
Is this just for convenience sake or?
Can't help but notice that all of these are actually bung/expanders (who needs a stack of expanders anyway?) which are bound not to be all that light, you see.
Just for info, I'm using a true bung (which effectively prevents you from crushing a fork's steerer tube) made of carbon which, although a little old fashioned (read heavy) by design, does a very good job when combined with a lightweight expander.
I assume that when you state "that does not slip down" you mean it does not fall to the bottom of the steerer tube whenever you try to manipulate it in its unexpanded state, correct?
There are a few solutions (none of them 100% foolproof but still) that make it more difficult for the expander to drop : use of carbon paste (a la Dynamis/Tacx and consorts) and even simpler, tilt the bike so it's at roughly 90 degrees to the floor whilst due the manipulation.
None of those tips prevent anyone from losing the expander in the dark abyss of the steerer tube but they do help somewhat.