HMMMMM...I see your point.

Just to be clear...I really did not consider THIS to be cutting a corner, per se, to make it easier. There is just really NO feasible way to run that filler ANYWHERE ELSE than where it is. ANYWHERE else around the the tank would either interfere with the rear tire, the exhaust or run up into the cargo area.
One thing I COULD do is completely cut out that down slope of the fenderwell, run the tubing, the re make the skin AROUND that fill tube.
To be totally honest, I dont see the way I did it pictured above to THAT BAD. Its not ideal by any means, nor did I think it was, but more of an OKAY compromise. The one point you DID bring up was re. the "DOT" approval. NOTHING about this tank is DOT rated. With that being the case when it comes time for me to register this mofo, I DO WANT to keep ANY ATTENTION AWAY from that fact from the refs. IF they see that filler stickin out there like that, that could be like a TARGET to sniff around more.
Ill look at it a bit closer, but where its AT is about the ONLY place it can go, but maybe I can tweak it.
Thanks for the input!