Doug:

Many thanks. I think I am going through the same process you set out in the last three sentences of your reply.

Since I don't know how to add an image to this comment, I am adding an image of the Composite Designs UL Power Panel  to my original post about the Kavilco cylinder head probes to see if the panel looks familiar to you.

Hi Douglas,  I saw your post from back in 2016 where you installed the return fuel line for your UL engine on the same end as your supply line.  I built a 750 with the UL engine and the fitting was on the outboard end of the tank and easy to plumb.  Now I am building a 650 and it will be much easier to plumb if I copy what you did.  I had heard some discussion that it was better to put the hot return fuel on the opposite end from supply to give it more time to cool.  Can’t think that is a problem, but wanted your opinion on how it has worked?

Thanks,  Robert inKansas

Thanks Douglas for responding.  I ordered aluminum fittings for the inboard end and will have them TIG welded in.