@ Insanity & P1t8ull I had thought about the new 642nm reds from laserwave but I was under the impression that they are already made up of two diodes with a cube making it not possible to use a second cube to combine the 642 with 671. I spotted last night that Rob is selling some 100mw 660nm diodes on his www.laser-wave.co.uk site but are only TTL and don't look like they can be converted.
Carl