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Fbov pretty much nailed it, the only thing would be his answer to question 2, I do use the grate to support it for the reasons he explained in his answer to question 4

Here's a few https://www.kamadojoe.com/collections/accessories/products/kamado-joe®-sear-plate https://www.pizza-porta.com/shop/pizza-porta-for-kj-joe-junior https://smokeware.com/collections/grill-grates-fire-grates/products/stacker-and-16-grill-grate-combo?variant=2080092848159 https://ceramicgrillstore.com/collections/kamado-joe-joe-junior-accessories-by-ceramic-grill-store

There's a few out there Smokeware has a swivel system https://smokeware.com/collections/grill-grates-fire-grates/products/stacker-and-16-grill-grate-combo Ceramic Grill Store has a muli level system

The cheapest I have found for the Multi Peace box is at the BBQ Guys https://www.bbqguys.com/kamado-joe/classic-multi-piece-firebox-kj-mpfb23

My second grill was My Big Joe then the 3rd was a Classic Joe then my 4th was a Jr. Now I have a Rec-Tec Pellet grill and yes I find time to use all of them LOL and this is my Wife after I bought a Blackstone

Pizza is good, Add it to BBQ Beans or Franklins Pinto Beans, And one of my favorites is make some Eric's Blue Smoked Cabbage and mix it in Here's Eric's Video but he used Beef Cheeks, Brisket works just as good

It depends on what version you have, If its BJII or III you just need to put on the spacer washer and nut to keep the hinge form opening, If its and older version you will need to tie wrap, Here is a video of John changeing the hinge of an older BigJoe, you could use this for help, This is what you use to lock the hinge on the newer versions, no tie wrap are needed

I have had my Big Joe for 6 years, My Classic and Jr for 4 years and the only one that cracked was my Jr and that was my fault, What I do is use a drip pan to minimize the amount of grease hitting them and I also flip them each cook and most importantly I store them in the grill to prevent any chance of moister hitting them

As much as I liked the new Kontrol Tower I gave up on them, They defiantly took more time and effort to keep them clean and workable, Like John said once all the coating peeled off it was a little easier, however I tossed mine and went with the Smokeware cap which isnt perfect either but much easier to clean

Here is the Spec sheet on the Jr. but it does not have the size of the stand https://blazingembers.com/kamado-joe-jr/

I got one on each of my grills, Big Joe, Classic and Jr. and they work just fine, there easy to clean and dont stick as bad as the KJ Kontrol tower but if you dont take care of them they will lock up too

Personally I have never had to add fuel or wood chunks during a cook before, I strategically place wood chunks that last the whole cook but if you need to add just twist the D&C rack off the basket and left

Mine has one too and tried to adjust the hinge to get rid of it and all I did was open a can of worms LOL, after a couple hours of playing with it i did get it back to where it was so as longs as you dont have a seal problem it wont effect how it cooks and I would leave it alone

You can contact KJ customer service and tell them and Im sure they will send you some at no charge but it could take awhile or you can by some on amazon https://www.amazon.com/Onlyfire-Replacement-Adhesive-Smokers-Louisiana/dp/B06XR7PZC5/ref=sr_1_8?dchild=1&keywords=kamado+gasket&qid=1588776569&sr=8-8

I second what Chris said except #3 You need to add more gasket material and that will make it tighter