Trick Pro V1 is the only one I can think of. Most doubles don't break down like that.
Breaks down into 2 singles?
Yamaha Flying Dragon, Yamaha 8500c, the DW's do it.
I broke my flying dragons down to two, was a breeze.
I have a single pearl demon drive, might just get that in a double
The demon drives convert. You remove the entire beater arm on the master that is connected to the slave by the z link and move it to the slave. Screws are on the bottom of the pedal.
If you plan to buy a new one...make SURE you get a set that has the shortened screws that attach the direct link. These are the 2nd gen DD, the old gen has potential to scratch the cam of the slave when in double mode.
see this thread
http://www.drummerworld.com/forums/showthread.php?t=84135
Thanks for the info, my local music store is willing to let a DD double pedal go for $440