If your asking me I cut the flanges off so no
adapter plates.. I dont care for adapter plates
being thats just another leak point.. if I need
that much space I make a thicker flange but
normally I add some tubing so I can use a 3/8
flange.. which I like.. and I cut each set of
tube free(other than the center 2) and drill a
larger hole in each pair so it can grow.. one
hole gives you the alignment and the other will
allow for growth.. thats worked for me for years
now