Many answers to lightsaber questions can be found here:
https://www.reddit.com/r/lightsabers...s_and_finding/
Essentially, yeah Corsi the blades are a heavy-duty plastic. Most of the manufacturers allow you to select from a 'standard' or 'light' grade and then a 'heavy' grade. Apparently both are suitable for duelling.
When it comes to duelling, they recommend fencing headgear and hockey-gloves as protective gear.
I have no real idea what these things are going to be like when they arrive. Basically, a few months ago I saw a facebook ad for 'duelling lightsabers: 2 for $40' and in a moment of drunken weakness, ordered them.
Of course, what I got was garbage chinese plastic nonsense. However, my interest was piqued by the videos and I started googling around and eventually found out about a bunch of the makers and that subreddit and so on.
I ordered a Remnant:
and a Torrent:
I'll let people know if I think this fairly large expenditure was worth it or not in a few weeks when they arrive.