I downgraded from a 18.5 to a 14.5 and was/am able to do wonderful long and slow smokes with excellent temperature control right out of the box with no mods. Sorry but I cannot connect the dots on spending hundreds of dollars to "make it a decent item to actually use".. Please...what did you do to the WSM to make it decent? Thanks
My WSM cost was $330 when new.
Total cost to make it into a really good cooker.....$1023
Increase coal ring capacity with expanded metal, ss fasteners....$20
Add remote temperature monitoring .... Dome temperature is unreliable place-$60
Weld handles to coal grate to pick up ring and grate as one piece.....$5
Replace too deep water pan with ceramic planter bottom and steel support to hold it..$25
Add handles to shell and bottom for carrying with ss fasteners....$25
Add turnbuckle to lock sections together to roll assembled one piece on wood deck...$18
Brace legs and add wheels...$45 (actually did twice 3-in wheels were too small replaced with 5")
Notch lip for temperature wire....free
Add legs to bottom grate so can sit it on top of top grate....ss bolts/washers ...$20
Make rack for hanging ribs..$15
Purchase different rib racks to try for cooking ribs x 2....$60
Add nomex gaskets for door and lid glued on with high temp black RTV...$20
Add blower/servo controlled damper and automatic controller (heatermeter)....$300
Add air distribution pipe for blower....$75
Right out of the box, my 18 doesn't hold enough charcoal for all night. Ash build up on the charcoal will cause the temperature to crater after 6 or 7 hours and to keep going you have to shake the ash off.... Then it will run several more hours.... Long enough to finish a cook. When I added the height to my charcoal ring with expanded metal, and got rid of the deep water bowl this moved up to about 11 hours that it could run without any attention reliably. That is the number one improvement to make to it, imo. Otherwise you'll wake up in the temperature will be 120. This could depend on the charcoal used as well. But for sure you typically have to shake the ash down after a number of hours, which makes it something you have to pay attention to.
I once had a big pile of standing ash.... That still looked like charcoal... When I jostled it it all collapsed and put the fire out. To continue that cook I had to take the shell off light a whole new chimney of coals and start all over again. Not fun to do at 2:30 am. The temperature controller and the blower now uses increased air flow when that begins being a problem to fight through it keep the temperature up. The additional air flow may cause the ash to dislodge better, or something, but I can run 25-30 hours and never touch it now. Truly set it and forget it. No I don't need to run that long but that capability provides stability for the time I do need to run. I had one brisket cook once that took 21 hours once.... I don't cook at 225 anymore.... One experiment with that was enough.
The blower and air distribution pipe also gets it up to high temperature easy. A lot of people want to get hot to cook chicken and actually end up putting a second vent on lid for more air flow. No need to do that. I can hit 400° in 15 minutes from starting if I want to. Introducing the air beneath the coals is way more efficient to achieve high temperatures for cooking poultry.
Now, I like my WSM. If I desire, it's very portable it can be run without any electricity. I can run my blower and controller on battery as well. I can run it the way it was designed to be run too. But here's the overriding thing....$500 for a 1970 era WSM....... Or nearly the same price for a new masterbuilt gravity feed with digital controller and Bluetooth...... There's no competition for most people today. Hence the wide popularity of the masterbuilt gravity feed.