I ordered a Bahtinov mask for my C8. I specifically ordered one that was for older C8s. The one I was sent is marked that it is for a scope with "Hyperstar" (whatever that is) and it does not fit well at all. The center cutout for the secondary mirror is at least half an inch too large and hence the mask hangs off center and substantial light is let in around the secondary. Will this affect the functioning of the mask, i.e. the position of the central line that shifts with focus?