I can give it a bash. 
I don’t own any myself though, so I can’t measure/weigh any, but I’ll happily collate the data. I’ll have a bit of a fiddle, and see if I can put something together. 
And thanks for the Pro40 info. I’ll update that soon too.
Edit: And I’ll chuck a link in to the Glass Dildo topic too, in case you missed it.