I did the conversion also. The first time it did not work at all. Whatever I used to replace the plate fell apart pretty quickly. So I set it aside. Since I am a pack rat, I did not throw it away.
Then I read this post by Ed and pulled it out and looked at it again. This time I used a piece if 1/8th Lexan, glued the cork to it and it works great!
Thank you Ed, for bringing this up again.
Fred