I made some modifications to my OK Joe Longhorn to use it as a cold smoker with an AMNPS. I've seen a lot of external smoke generators on this site using mailboxes or other piped means in order to reduce creosote/bitterness on the product when cold smoking. I made a way to "pipe" the smoke from the firebox into the cooking chamber for pretty cheap and with little effort. This piped system doesn't have the benefit of cooling the smoke but the AMNPS produces some pretty cool smoke anyway. I did a productless trial run this past weekend and it worked great...just have to add a hotplate or something since it's so cold here in southeast PA. I want to be able to run it overnight without babysitting.