What is the proper way to seal liner to stove?

So I've seen a few different ways that people do this. Some use cement, sealant, metal tape, other aeronautical tape.... so what is the proper way to get a draft free permanent seal?

I'm looking at relocating the blower on the 30 so it accessible for maintenance when this season is done. The liner will have to be loosened/raised to do this. So when I reconnect it what is the proper way to do this?

Also for those of us with a tight fitting liner that doesn't easily move up and down why don't they have some sort of slip joint at the stove that would make removal easier. This will be a small battle all in it's self to get the liner to raise 2"-3" to remove the stove.

I'm also thinking of an offset box but have yet to see one that is draft free or air tight. Any recommendations? Any reason these need to be stainless? I'm almost thinking a guy could weld one up out of steel if he could get his hands on some 6" round collars. Wouldn't be that hard to do?

I see, I guess my vision of a tight fit is different than most stove designers. Unless it's a press fit there's room for air to be sucked into it and up the liner. I dunno, just thinking out loud there. No smoke leaking, I just want to seal everything up as best I can. I guess you wouldn't run a stove with a leaky door gasket, why wouldn't you want everything sealed up tight?

The stove is pulled out as far as it can be before the liner touches the inside of the steel firebox. It has a step in it that is deeper into the firebox that is actually in the way. It could be pulled out more with an offset box. Maybe upwards of 4". Not earth shattering but it would put the stove 4" farther out into the room. Which is the whole idea. A tee would not be beneficial in this installation.

I wish I had enough room for the elbow but I don't . The elbow would at best gain me an inch, probably even less. I just don't have that kind of room between the top of the stove and the bottom of the steel box. As it is an offset box would be tight. Still think a guy could weld one up. I may try that if i can wrestle up the steel.

yeah I took a few inches off of them before install. I've got some inches to play with above the stove but not a whole lot. It's suppose to be almost 40 next weekend maybe I'll let it go out and cool down so I can take some measurements.

thanks tfdchief. I might be interested if I can't fab something up myself.