I see he used marine JB Weld to secure the tubing to the fittings. I will probably make mine too using brass fittings and solder the tubing to the fittings.
My RCR came with this style, but I went a different direction...
Careful with the JB Weld and other over-the-counter adhesives...it may last you a season but few adhesives can handle total fuel immersion for extended periods, so are not fuel-proof, maybe fuel resistant (but for how many hours?). Even aircraft/mil-spec "ProSeal" tank sealant breaks down in gasoline after a couple of years and needs to be reapplied. Most are formulated for Diesel/Kero/Jet fuel, and not gasoline...
My RCR didn't come with any tubes. A 3/8" NPT weld-in-fitting was installed and that's what my pick up tube will screw into since it's on theinboard side of the tank. I've ordered brass 90s and will solder or braze a tube into that fitting.