Hey Nickbee I was in the Tips and Techniques thread and noticed you asking about side mounting servos. Have you seen the servo trays SR provides for their wings? As it turns out I was looking for a way to side mount my servos on my D7 and I had left over servo trays from a wing I bought from SR. They worked like a charm .I'm sure you could produce your own version using their tray as a model.
Have you done a pull/pull system before?