My Waco with the DLE 20 installed. I agree the Saito 4 strokes sound awesome, but I just love flying my Waco with the DLE 20 in it. It has plenty of power and fits perfectly in the cowl and uses gas instead of the $20 gallon glo fuel. It sounds plenty good to me. I don't think it sounds like a weed eater at all. I fly it at 1/2 throttle or less and sounds good.
I still have a Saito 180 in my Skylane 182 and Saito 125 in my Funtana 100.

Thanks,
Eddie of OKC