[TWOOD]

Earlier in this thread DV confirmed the size of the stainless tubing that would work.
Excerpt:
You can get 304 Stainless, .500" OD and .4375 (7/16") ID in 12" lengths from McMaster-Carr for $6.33.
Using 3/8" bow from CRII I would have:
.0625" (1/16")clearance or .03125" (1/32") each side.
I'll guess that the powder paint millage wouldn't eat up all of the clearance.
My point:
Here is the part number for the tubing: #8457K27. In case anybody is looking for it.