Yea, thats what I'm thinking.  Does the 1015 sit at the right height if I ACC it to the existing supports, or does it need shimming? 

Yes, thats the one.  Its a great decoder to stick in all sorts of things.  Here's a pic of the install in the Dash 8.

http://zbd.com/photos/NScale/Dash8-40CW_Decoder.jpg

Now to figure out how to get Micro Trains couplers in this thing.

Whoops, typo...thats a Digitrax DZ123.... Z scale, but Ive fit it in some small lokeys like a Life Like C424 and such....

Answered my own question.  I put a DS123 in it.  It wired up right to the circuit board.  Route the wires to the side of the board and around, and tuck the decoder below it in the slot. Perfect fit!

Howdy
I have a Spectrum Dash 8, part number 86066, and need a dcc decoder for it.  Which one should I use?

Thanks
-=Bob