Hi Mike and thanks for joining!
I too have a SNP but over time and experience have come to understand that there are modifications needed to it, that honestly, sometimes seem like a pain in the backside. Do not jump to conclusions.... it is a great unit and I recommend it to anyone, and it was and is still perfect for me. However comma once one progresses into middle and advanced smoking its shortcomings become more apparent.
Let me explain:
The wheels stink and are on the wrong side for weight distribution. Replace with rubber wheel, ball bearing units affixed with 1/2 inch chrome nuts bolts and washers. Placement is something we have to live with unless you want to re-drill support pipes.
The heat and smoke from the firebox flames out into the smoking section and is difficult to control. A baffle is needed. I am in the process of getting one made. This site is the place to go for folks who have been there done that. They are pro's and are the example I am following. You need a baffle to re-direct heat/smoke/occasional flame downwards under the metal, not onto your meat.
The grate with handle unit that hangs in the smoker area is best explained off-post.
The warming tray should be removed.
The chimney needs an extension- see other posts here for some really great ideas. Clothes dryer tubing..stainless steel ....my gawd, these people are smokin' animals!
The firebox door warps. Take the undulating metal plate and have 1/16th inch stainless fabricated to its pattern. Life is good after that.
The firebox grate warps. Shoot something that is edible and after your angst is over, get a firebox fabricated. I hear one can buy one for around 15 dollars, we'll see. (My weaponry is still loaded, my angst is still high).
The thermometer is a total no-go. replace with a real unit with a long probe. Better yet, I saw a pic in here of a SNP with 2 hard-core temp guages on either end of the smokin' box plus probes. I dunno about probes, I tend to remain a less-tech-is-better kind of guy. I mean, after all, cro-magnon man smoked a mean piece of meat didn't he? However comma the probes give you real-time instant-truth reading everywhere you put 'em, so if that is you, go for it.
Okay, you get the idea. You do have a good unit, great air-flow and a lot of fun to have. Do not get discouraged. Aircraft pilots do not get discouraged when they start out on the old Stearman bi-planes with adult supervision in the backseat.
Enjoy your smokes and as you tweak and poke you may decide on something else. Who knows. Many haven't, but their food is still great and their times are still good.
I know I have been long winded, but I hope this helps!