I have the perfect solution. it sounds crazy but it works. its what i did on my ski. however your going to need a stock SN fuel filler with cap.
I pulled the pickups from the top of my tank, then i carefully bent a 90 degree angle in each of the fuel pickups (the internal part) and installed the fuel pickup fitting where the stock filler used to be on the tank. installed a hose clamp and called it done.
then i took the SN filler put it in ice cold water, then put the top of the tank in some boiling water let them sit for about 5 mins and shoved the stock filler into top pickup hole in the tank. its a tight fit but once its in....its in.....seals perfect.
so my pickup lines run out of the back of the tank (hole near the waterbox) and are hidden from sight. and I have a perfectly functional filler on the top of my tank.
Its a really clean setup and best of all you dont need to cut/seal......none of that crap
if my words dont explain it....i can post pics later