RE: KYOSHO 40-size a/c in the US
One more note on the retracts for the Me109 and the Spitfire. Be sure to buy retracts that allow you to reverse the action since on both of the aircraft the gear goes up towards the wingtip.
I used a set of 40-sized mechanical retracts from OK models but to use them I needed to disassemble them and reverse the direction of the arm that connects with the servo. This was not entirely straight forward as reversing the arm messed up the action so I ended up having to both add a sliver of wood to prevent the arm being pushed too far (and getting locked in that position) and filing down the face of the plunger on the arm to regain the smooth action. I saw this being talked about in another Japanese RC magazine.
It does seem just a bit wobbly on the 40-size retracts so I think I'll have to be gentle on the landings.