jbrown,
The split elevator (2 pieces, R&L) will be connected with a "connector" either a piece of wood dowel or a pre-bent piece of Usually 5/32 wire. No problem here as this is quite typical. You will run a push rod to a control horn mounted to either the L or R elevator and because the elevators have been connected as above explanation, any input to that one control horn will move both R&L elevators together. Tis elevator push rod will be activated by one servo. This is a marvellous flying plane and you will love it. Very stable with a good amount of potential for good airobatics. A .46 is perect power and if you set it up as a tail dragger it will be an easy plane to handle on take off or landing. Good luck.