Yeah I went with brass 1/4 inch rods as the fit the grill holes and amazon had them at a decent price.
After playing with the setup I can see I could fit 24 with very easy access to the wires if I leave in the fans.
I have yet to remove fans but I could fit 32 if I did. of course if you have a wider bench you can do 3 foot or 4 foot rods you just need to add 1 more grill for support.
Stainless steel rods would be nicer if you can get 2 foot ones.
I have to test a 5/16 inch rod .
3/8 inch do not fit the grill.
My goal was a tool free build that works. I think I did that.