need your comments observations

i have a J Mummert divided plenum intake and i'm thinking of using a 1" spacer. reading T Eatons spacer tests in Y-BLOCK mag  the tapered spacer seems the way to go BUT...the underside of the spacers appear to be hogged out to such a degree the the centre does not seal to the dividing wall of the manifold.    does it matter if there are a couple of half moon gaps or would i be better off with 4 straight holes.   not racing just strong street

thanks in advance for any comment and/or mickey takes

stuey