I would also replace the tail wheel. I used the stock setup on my Ultra Stick 40, which is the same as the Aresti, and it broke off after only a few flights. I went to a Sullivan Tail Wheel Bracket and I haven't had any problems. It looks good too. I did add another piece of thin ply to the tail before I mounted the vert. stab to give the screws a little more to bite into.

If you would like pictures of the setup I can send them.