Has anybody tried out the Diversity-System from ACT?
More Information is avail here: [link=http://www.acteurope.com/]ACT europe[/link]
A buddy is about to order a system and try it out in his 2,5m Katana. If erverything works as expected I´ll give it a try in my SU-27. Dual receiver setup, fully programmable via IrDA and Palm, dual frequency setup possible etc. Seems to be a promising system.
Its PPM but with dual receivers checking each other for data integrity full operational failsafe is possible. No need for DPSI or powerboxes, up to 20 Servo output channels, each one programmable. Very Promising.
Good discussion of this topic is here: [link=http://rc-network.de/forum/showthread.php?t=18242]RC-network.de[/link] (sorry, it´s german, but good info)

regards
Thomas