Still working on trying to ship the 21FP4 from the general area of “The Cheese Capital of The World” to central Texas, W/O paying a king's random, no easy task.
In the meantime, I have been looking online for 21 inch tubes, for the heck of it, not much to be found out there on eBay, good/bad or ugly.
I may try to do SOMETHING with the 21EP4B, but I'm not willing to add to my list of lacerations and sutures to do so! :P