Wire-wrap wire OK to use with DUO2SE?

Anybody here had installed duo2se?
I know I have to use thick wires for + and ground.. wire-wrap wire is thin and I'm not sure if I can use it on the rest(A-Z)?
If not what gauge I can use?
:chinscrat

thanks....

30 guage is fine, i've used 40 guage for a dms3 once and it worked fine.

40 guage? wow. Must be thinner than hair.