I have a Johnson two line tank in good shape except for a small hole in the bottom.While I was considering options for patching it,I remembered a single line tank of the same vintage a friend gave me.After removing both tops I see the two line top is a perfect fit on the single line tank.Only problem I see is the single line tank has no interior baffle.Will be this be an issue?Some reason a two line tank needs a baffle and a one line tank does not?