I have a favor to ask of all you KM owners.
Could you measure the width of the bottom of the heart on your KM? I mean, the part that goes into the mouth of the vase, which has the base grommet(s) on it, where the downstem protrudes from, and where the holes leading the hose and purge valve are located.
Then, measure the width of the mouth of your vase as well.
And one more thing, please tell my the type of KM you own.
If any of you could do this, it would make me more than happy.