Falconwings, word of advise,

after fooling with 3 different set of gear, from different GERMAN mfgs I can tell you you are better off getting them converted, I have used IQ Hammer, AIr Tech and Behotec 4mm setup... simply not worth it. They take way to much air you will be using like 4 tanks and unless the system is charged to the 90-120 PSI range the power of pneumatic goes down considerably.

On my tomahawk iq hammer gear, i was lucky to get 1 successful retraction and deployment this was with 3 large air tanks 4mm out put, 1 complete cycle dropped it form 110 psi down to 70 psi, I had to set the tam jets fail safe to 75.

The airtech 4mm were a little better ONLY because the gear were smaller, still 20-25 psi drops using 2 large 4mm out put tanks.

Down & locked conversions with there OVERSIZEd 22mm motor made all these problems go away, actually it was cheaper to do the d&l conversions then to buy electronic valves and sequencers, fittings, tubes, and gauges and fill valves.