Tall Paul as a lark installed a Kadet wing on backwards one day and flew it. I would imagine that it changed the stall charactaristics somewhat but on the whole he didn't have any trouble with it.

But that didn't have ailerons on it. when you start trying to control the model with front mounted surfaces a lot of bad things may start to happen. Flutter issues come to mind for one. There may well be control effect issues as well. No one does it that way so you're on your own to experiment on that one.

The vertical stabilizing area issue will still be the biggest one though. Look up some info on "vertical tail volume coefficient" and run some numbers to get a feel for it all.