My first small engine run

Hi All,
Thanks for the kind words, Dan. Chad, the rope works well, but I replace it every time I do a tear down because it seems to pack tight and I’m afraid it wouldn’t seal well the second time. I’m trying a flat type Matt uses. I’ll see how it does. I’m moving ahead with a new cooler which will provide approx 39 lineal ft. of 2" d 16 gauge pipe from an old swing set. That translates to approx 23 ft2 of radiating (cooling) surface. This includes the surface area of the manifolds also. I could also use a shroud around the cooler to preheat incoming air and feed it to the existing preheat shroud on my cyclone. Need a new filter container first.
Pic 1 Concept drawing 1
Pic 2 Concept drawing 2
Pic 3 Full size layout of top and bottom manifolds
Pic 4 Lining up pipes with manifolds.
Pic 5 Layout for cut only
Pic 6 2" holes cut and the fit is good. Next, cut out individual manifolds and begin assembly. This is the base from an old belt driven 1 hp air compressor. It 2.25" deep and the manifolds are 4" wide. I planned the width of the manifolds so the strip in the middle was wide enough to finish some of the manifold sides complete with built in corners.
Pic 7 Weld from underside. Start bead on thicker metal and bring the bead just to the edge of the thin metal tube and don’t slow down! The 3/4" pipe will be removed.
Hope to have some assembly to share tomorrow.
Pepe