From the replies following my post there seems to be some confusion on what I am offering. Adapter is a misleading term here. What is needed is an alternate cap on the existing post that accepts a male banana PLUG. We have made these mostly for our dealer but customers are welcome to them also. My lab and system is all bananas and 3/4" spaced doubles. The RM-10 banana cap simply replaces the standard cap. No muss, no fuss.
I would have made these standard but there was no interest at the time.