For those that have installed a lycoming in their Kitfox can you tell me what size fuel line you used from the header tank forward and where, if any, reductions you made?

I'm installing a fuel flow computer and have found some things in the fuel system that don't seem ideal. For example the header tank fuel out line is 1/4 to a shut off valve that is reduced to 1/8 then back up to 1/4 to the gascolator, then reduced back to 1/8 to the carburetor. I would think the middle reduction is not a good idea, can anyone give there input on this?

The current system passed the flow test requiring about 15 gph from gravity, but I would like to have a constant size until the final reduction into the MA-3SPA carburetor.

Thanks for the input