[quoteI like your version of a set of 55 stacks better than the originals...at least your's line up the output of the 55 to the input of the stacks!
Mostly however, I loved seeing everything in the background Jim, you have a marvelous set of toys!
Rog][/quote]
On my 55G, the stacks are adjustable for height. Just pull them up to match their port to the exhaust pipe(s) from the cylinder(s). The o-ring on the stack base support seals them.