That’s Good you have the RBA Sections that came with those Tanks. Hang onto them. Because as we move forward, it may become Increasingly Difficult to find Coils Heads.
With a Spool of Wire, a Bag of Cotton Pads, and those RBA Sections, you would be set for Years, if not Decades. And Never be at the mercy of Running Out of Coil Heads.
BTW – Having some replacement Glass and Seals for those Tanks Isn’t a bad idea either.