Ahh Heli "Training Gear". I remember them well. We used MANY sets of them training Heli Pilots. One guy went so far as to attach a Hula-hoop to them to give even more stability. It added a lot of weight (
which also helped to slow things down) and gave a greater area of ground contact. These saved many blades, paddles, shafts, gears (
and the list goes on and on and on with Collective Pitch aircraft) over the years.
When done perfectly the CSC is an effective shutdown procedure but if your timing is even a tiny bit off you give asymmetrical thrust = roll over. Throttle down is your friend here.
As my friend
@MapMaker53 pointed out even the best of landings can still be troublesome if the winds aren't playing nicely. We use Hand Catch so much that we added it in our Corp SOP manuals. I'd say I hand catch 99.999999% of the time unless I'm flying as an instructor
(we don't teach this initially to students).