I do it with 2 mark is. Just use one of the usual templates and set one to control the first eight tracks and the second one on the next 8. Since that is all controllable by scene/page selection on the Nano itself you should have no problems.
--------------------- "WTF I just read the last line of that HAHA YOUR GF GOT FUCK*D IN THE AS* BY ANOTHER GUY!!!" BIMMER SOLD) WS-6 Now !! With full boltons ... Also 1996 Chevy Silverado 5.7 liter Vortec / 4X4 MyCar
the nice part with the reaper implementation is that the tracks you have controlled by the Nano show up with an appropriately coloured strip vertically along the left hand edge of the TCP! Makes it harder to get lost....