Part of the rainwater might escape with the outlet curve on the top (left). It will also be easier to clean out/snake with the curve on the bottom (right).
Speaking of Jeff causing eye glazing, I will be the last one to reply, someday, as I don’t want to be blinded, I need my eyesight intact as a newbie HI:p Getting sick to my stomach or constant daydream fantasies… some kind of unnatural conflation, AAAAAAAAHH! / aaaaaaaahhh
Should do a youtube of an unsuspecting HI apprentice looking through Last One to Repy Wins for the first time:D