This is what is inside the Dash 8 with cruise. The smoke unit is clearly marked TAS. The board on the left is the R2LC-C, and the center board has the sound chip. The only thing left is the board on the right for the cruise function. It's not well marked. Underneath the mother boar is a heavy aluminum mounting frame which apparently doubles as a heat sink. There is a substantial bridge rectifier mounted to the bottom of it. I presume the units w/o cruise would be similar, although I guess I should really open one and check.
If I go with the CC-M option, how much of what I have do I need to change out? And based on GRJ's comment above, it looks like I'll need to do all 3 units.
Chris
LVHR