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I have used a 12v Tritronic replacemewnt battery with the receiver---- small, light weight cost approx $17 on the WEB.

I also have found that using bow string with the release work much better...

I just finished making a remote launcher per info found on this forum. I used a Piezo siren ($4.95 at the local science store, 102 db) and a 4ch receiver/transmiter from E-Bay ($9.99). The siren...

Has anyone tried using a Duck Sound board in place of the Piezo Siren?

ex. Qkits FK254 PCB Duck Sound Board

Not enough posts to PM. Any shared info would be apprciated.