On mine, the slab elevator doesn't allow access to the rudder to hook up the springs. That would have been the prefered method, but it wasn't too difficult to hook up a pushrod to it. Look at the picture of the tail in my post and you will see what I mean. I looked at the picture on your site, that is the exact same tailwheel I used. If you look carefully at my post, you may see the lump where I added some 3/16 ply to the underside of the fuselage. (But none of this will help to explain why intelinside would want to convert to a tailwheel...) It was still fun making it work, and flying the result.