Firestone. Another option to the fuel dot or quick fill valve is this pinch line. In the pictures
it is mounted directly after my pump before the needle valve. I don't know where my buddy
got it, but at the pattern competitions it is a lifesaver as I can remove the small line and use it to
fill my tank, then reinstall the small line and start the engine and do a pinch test before flying.
In picture one you can see it close, in pic 2 you will see it right behind the header.

Some people will say it's unsightly but you only have 4 mins at the contest to start the plane
make sure it's tuned. with this little pinch line setup not only is it easy to fill the engine but
a quick pinch makes sure the engine is close on tuning.