We have seen many HUPs in strange places and circumstances. While we have a break in the never ending HUP internet search, here is some "strange" HUP stuff to ponder.
When you look at the rear end of the HUP (C8A) frame you will see that the last crossmember has quite an assortment of holes punched into it (see pic below from Phil Waterman's website
http://www.canadianmilitarypattern.c...20Page%202.htm ).
What were these holes for? So far, all I have is a theory. What's your take?