The first thing I would suggest is deciding which year you wish to represent as that will dictate the various modifications and vehicle markings. Just looking at the photograph you provided I spotted a few things that I would suggest changing. The camouflage net is not required for UN service and the ammunition box on the back fender should be replaced with a British water Jerrycan. Your ammunition boxes should be British H84s which are slightly smaller and constructed differently from US M1 or M19A1 cans. I also see British water bottles in your Ferret which were not used by the Canadian Army.
The markings on my H84 Mk I are later than those used in 1965, but the can design did not change and this is a comparison image with a Canadian marked M19A1 can.