I think you are correct about the process, Robert. For the more common dovetails, they do seem to be equally available in both varieties. For some of the rarer chips, who can say. I'm still missing the following dovetails in case anyone has them to sell or trade:

Dutch Tevern, Merced, CA 50c, green tail
The Mint, Las Vegas, $1 NCV, brown tail
Diamond Jim, no town, 50c free play, dark green tail
Binions Horseshoe, 50c, red tail,
Riviera, $100, red tail

DonL