Use them a lot but not quite as you described. My 6 wt. Delta has a
19' front taper. I cut it at the 10' mark then looped it. I can then
use the floating tip, or any of the 10' trout leaders. Basically gives
me a multi-tip line.

If anyone has an old standard WF thats worn out and the tip won't
float, hack off at least half the front taper, loop it then use any
Polyleader you like. Best done of 5 wt. or 6 wt. lines. There are
alos light trout tapers for lighter lines.