how difficult would it be to work on bending that stalk down so the new plant might have a chance to start growing roots befor you sever it from the parent plant?
if it doesn't twist the parent to much to do so I might try to put the new rosett on the gravel and see if it started to grow roots and after it is has a start of roots then you can sever and move it more. just to make sure it is on its way to self sufficiancy.