Nice Conversion! I was thinking of doing one of these for a Saito .30. You might look at the FMA M5 (or something like that), a Berg receiver, or a JR 700 comes in at .6oz with the case. Also, if you have the $$ get the small voltage regulator from FMA for $22 and you can power your radio with lipolys, a 2s 340 would weigh next to nothing.