Don't think you would want to use a tugger with those cables.
Personally I think the "2 90" requirement is silly. I can't imagine how you could comply in many situations. No reason that you can't upsize the conduit and use a lubricant if necessary. Never heard of a lubricant damaging a cable by the way.
Maybe you need to rethink allowing IT techs with no experience doing this type of work.
-Hal
