I got brave and took the RDS 8000 apart to have a look inside. You know how sometimes you go justa  bit too far...well this time it worked out ok. LOL I added a fire button to it and tested it with my Elmod tanks. Works like a charm. I like the fire button mod! Thanks for the input fellas...I am still not sure about that one aerosport, but I figure it is a problem in the radio itself. Oh well...</p>