It can be a slight All-Day Cockring in a way. The skin on the scrotum is very thin, so there is a possibility of Zinc intake from the rods and the currency it creates. The copper should keep the balance though. I wore mine usually during daytime when I was able to check on it. By night time, as long as it's not too tight, why not. The copper can create some zits though, keep the unit clean!
One could really purchase the needed parts for under 15 USD and the hacksaw isn't expensive either. Desire, as SWM said, comes to play. Silicone tubing, rods and that's it ... I mean, give me a Victorinox with a metal saw and the materials, it's 10 minutes or so from start to finish!
I haven't worn mine in ages though, but maybe I should. I'll be having a visit with the urologist hopefully quite soon enough, that might give me more idea to wear or not to wear.