The Falcon servo come with connectors for either the tiny IDCs shown (standard on the Falcon stuff), or the 'mini-JST' sockets that many other micro systems use (like the Platraco servo RX, JMP servo RX, Micro-Joule RX, etc.). They are small enough that I mount them inside wings on a number of models to get a direct linkage, so far up to 24" WS. Their throw is short and does take some getting used to.

For a more standard servo, the Blue Arrow servos go down to a bit under 3 grams and are just 1/4" thick. They should fit in the Stuka's wing OK as well.