Yes I recall what Bill made up and was thinking how I could fab one without a welder. Its a bucket list item for sure.
Reason I changed from the smaller size returns to the correct larger size is I never had a return off the filter head till about 2 years ago. Bleeding a new filter took a long time because ALL the trapped air had only the injection pump to find its way back to the tanks. On my return design I run a TEE plastic fitting into the return from the number one cylinder that usually runs back under the intake manifold to the 3 way or as some call it.. 4 way.....
And on the number 2 cylinder is where the return off the injection pump enters the system.. Then that side of the engine flows back to the new to me 3 way fitting that does not have the rubber olive in it. BTW I had to cut down one of those manifold bolts to fit the new fitting back there. Ever try to run a return line under the glow plug solenoid plate that Banks supplies.. It just ain't happening. So you loosen a nut way back under the turbo. the loosen another bolt at the plate and then remove the 2 manifold bolts so the plate comes off. Its also best to remove the solenoid from the plate but.. I felt I may be able to work around it.. Never again will I do that. Oh yes, there's another good idea to remove the filter head support so you have enough room to reach number one cylinder.
I found mt hands are not able to press down the caps till you hear that special snap when they are seated on the injectors. so I found the box end of a 5/8 wrench fits on top of the cap and is easy to get some leverage to press down to seat the caps.. As I get older and weaker I find ways to still fell I can do a job.
Still have a few things to do before I test run this. But the worst part in hopefully done is their are no leaks.. Leaks would really suck and blow at the same time.....