I can share my experiences doing the same with my 2900. Your layout is similar but obviously not identical. My 2900 had the AC under the v-birth and the shower sump in the bilge right in front of the bathroom (thru a floor access panel).
I got tired of dealing with a wet bilge since the AC dumps a surprising amount of condensate in the forward bilge.
My route was from under the v-birth, under the dinette via the lower access panels and down thru the floor under the shower. I had to drill a few holes through the bulkheads along the way, but it turned out great. The hose was pretty flat running along the floor under the dinette, but without any dips, it drained well. As long as the source is above the destination AND there are no high points above the source, it will drain (just be careful with winterization if there is an area that will hold water).
As for the shower sump, if you have a rule sump or equivalent, there are usually multiple inlets molded into the box. I found one which was the diameter of the hose I was using and you just have to saw off the tip of an unused inlet.
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