Here's the little update...
Got the top today, needs some more sanding. Today I figured that bottom openings of the barbs are small, so tomorrow I'll have to remove some or all of the 'ribs' under the outlets. I wanted to keep them for some benefit of structural integrity, but they'll have to go. The barbs are 10 mm ID inlet, 12 mm ID outlets... I hope tomorrow night I'll have some temps to post...Hopefully good ones...
Sorry for a 'little' big pic