I have seen Canadian Sabres in active service and several Sabres in the air show circuit and none had modern ejection seats. I had this very discussion with one of the owner/pilots of an F-86-F and he stated that he did not know of any Sabres with upgraded or "modern" ejection seats. Ejection would be a last resort and only if the aircraft could not otherwise be saved (re aircraft in private hands).
Thanks for the information regarding the origin of this kit (Hasagawa). I passed on it because I thought it was a re-issue of the old Monogram kit. I also love the early jets and the F-86 and the A-4 are my favorites. I'll be watching the build and keep up the good work.