If you guys are interested in seeing a Kraft Multicon retract instalation in the Curare's american cousin (the Tiporare), you can check out the following link:

http://www.rcuniverse.com/forum/fb.asp?m=8761413

The post right after also has a short movie showing the gear in operation. I'm building two such Tipo's with Multicons. As mentioned here, they are simple to operate, to install and reliable. The only disadvantage I'd say is that they are a little noisy once installed in an airframe but foam wings help a bit with that. Also, although I have no experience with that, it has been said that some users have experienced issues with engine vibration on the nose gear which is mounted in a foam supported cradle. They are cool in how the operate in a staggered scale like manner - all in all great gear.

The amps allow you to power them directly via the radio battery but personally Iprefer a separate source particularly with the earlier 2.4V units which can be powered nicely via a single A123 1100 cell. With this configuration though, a DP/DT switch needs to be used in conjunction with a servo since the 2.4V unit amps require both 2.4V and 4.8V. This from the day when servos used 4 pin connectors and batteries were center tapped for retract purposes. However, I like the single A123, switch, servo and 2.4V unit setup. Keeping the power source separate from the radio also provides a little additional piece of mind in case on the the gear should stall and drain the battery. With the A123 you can attach a high C lead to it, glue a Deans female somewhere easily accessible on the aircraft and plug in a (up to 10C) charger to "juice up"the gear much like you would plug in an air pump to "pump up" pneumatics.

Compressed air, compressed electrons - basically the same effect on a pattern ship...

David.