I've been told that the only stupid question is the one that's not asked. I guess this is true but I also think your doing way too much thinking here. That also can be a good thing. A non-overpowered 4 star will fly just fine either way. I like the idea of moving the servos inboard but you need to have enough servo lead to not only reach the receiver but also enough slack to be able to plug them into the RX. This will become a pain cause you'll have to undo what ever is holding the RX in place to plug in the servo leads, then re-install the RX and put the wing on. It's a lot easier to plug two connectors together when putting on your wing instead of of plugging two servo leads into a RX. Think about it.