This script is in active development now adding lines similar to @Aragorn 's script to later GET the xorurls of the std test files and compare download performance.
The differnce is @Aragorn’s script stores random files of std length, I want to see what std content files of varylengths can tell us about network performance in general and what effect deduplication will have when many upload the same content and then try to retreive it
Thats the plan anyway but i am realising just how rusty my bash is - its probably worse than @happybeing 's hull 
So anyone who wants to tidy, improve and extend that script is very welcome.