I have used it, but I do not put the amount of hours you guys do on any mowers.
It works great, we have had that edger for a long time, we made a bracket so it would fit the Shortcut.
I know a dealer or 2 with used edgers and maybe even a bracket or 2 laying around.
Your best bet would be to try one before you buy it.
Let me know if I can help this happen for you.