I assume (my 2nd grade teacher would have said "ASSUME makes an ass of you and me") that your Tikka has a Valmet/Krieghoff sliding-hood lockup action? If so, and it does regulate without the spacer, I'd leave it off on the general principle of "if it ain't functional, get rid of it." The cosmetics are really not relevant on a working gun like that. Just my opinion, of course, but I have my reasons....
