Ahead stem on threaded steer, is it possible?

I have them on two bikes... One is a polo bike so it doesn't really matter wtf it looks like but the other looks great on my Roberts, i.e. it's invisible... You now no-thing! :P

ahaha well, I'm not saying people should change forks just to go threadless but if you come across a cool fork with a long steerer, like I did, why bother rethreading it and using an older more complicated HSet system when you can just use 'ahead'?