The reason I ask is I found mine really pulling my helmet down, in turn pushing my safety glasses into the bridge of my nose , very uncomfortable
I have an Emerson counterweight “pouch” fitted to the back of my helmet, and installed a metal torch to see if it helps, it did a bit.
but it needs more weight, so a visit to B&Q today to see if I could get a large bolt. The intention was to fill the treaded area with washers then a nut at the end. But the bolts in the “Pick n Mix” hardware section are just pot metal with little weigh to them
might look into a fishing store and see what I can find
I have also heard of folk using wheel balancing weights. They have adhesive tape, so just stick them together to make a block 🤷🏻♂️