here is a link to a product review for the peterson smoker pucks explaning how they can be used in the bradley.

http://www.salmonuniversity.com/Peterson_Puck_Review.html

The answer is yes, they do have to be put in manually but the pucks will last nearly 5 times as long as the bradley bisquettes and are the only option for a less expensive alternative as far as I know.

Thanks, and i hope they work out for you.