Thanks everyone for the replies. I do plan to put a couple on E-Bay and see what happens. Time will tell. Also, to "
indy-roadrunner" you may have seen in my signature that I too have a Trail-Air pinbox on our Mountaineer. That is why the pics were not taken on our unit. The photo's in my post above were taken at an RV lot. My daughter works in RV sales and I was able to use their facility for my photos. I am waiting for my wife to make up her mind which flowerbox model she likes best as I will begin to make one for the Trail-Air. The wooden one we have currently was modified to fit the Trail-Air. It just had to be modified to make room for the shock mount and the Schroeder valve. See wooden box on Trail-Air below.
My daughter wants me to make one for her travel trailer that fits on the propane tank cover. Will have to see how that works out.
Thanks again for your much appreciated input.