As requested, here is a step-by-step pictorial of how I convert Atlas HO code 83 turnouts to On30.
I went this route for two reasons.
One - The Peco On30 track is lovely, but I wanted code 83 rail, not code 100.
Two - I had loads of code 83 track and turnouts, and being a cheap fella, wanted to use that up.
So, off we go. Here are what I started with; rather than laboriously identify each item, I'll just include what I used in the picture.
I went this route for two reasons.
One - The Peco On30 track is lovely, but I wanted code 83 rail, not code 100.
Two - I had loads of code 83 track and turnouts, and being a cheap fella, wanted to use that up.

So, off we go. Here are what I started with; rather than laboriously identify each item, I'll just include what I used in the picture.