As someone who overengineers stuff all the time, I respect it.  As someone who thinks the product coming off his egg is pretty darn good, I'm looking forward to hearing someone say this thing provides sufficient incremental benefit to justify its existence.  Lack of incremental benefit historically hasn't been a cure for a case of The Wants.  But this thing looks like yet another solution in search of a problem.  Except for the smiley face.  Need me some of that.

And who cooks with that teeny amount of lump???

i hang my smaller pizza stone down lower with the spider, that extra space above the stone with tjv's setup seems to solve the problem well enough, even with 34 pounds of butt and brisket in there. i dont see it working better with this setup in fact sometimes i setup for a hotspot on purpose

How did we ever manage?

@mEGG_My_Day  said:

Interesting - I wonder if that will fit in an egg??  
@stlcharcoal - any idea? 

Not sure, but I'm going to try it out.  I haven't unboxed anything yet.

They come with the Classic and Big Joe Gen III's.  The new III's are 4-5" higher than the Gen I and II's.  So, while the insert may work, the issue is going to be the racking system.  The D&C system that comes with the III's is a THREE level system designed to sit on cast pedestals on the insert.  So I don't know if there's enough room to close the lid with that new D&C in the previous KJ's or the LBGE.  I highly doubt you can in the XLBGE.  (I believe KJ FAQ's have a typo about the compatibility.)

If the insert DOES fit in the Egg, and the racks do NOT, then I'm sure you could engineer a double racking system using the SmokeWare swing stacker or with some lag bolts.

I'll try to jack around with them this weekend and report back.

Huh? Looks like someone else's way to try to make my money his. Guess I don't understand what this does. Or why I want it to do it.

next someone will invent a little temperature-controlled fan to blow the air around and maintain a set temperature

In the Large BGE......

There's a bit of an issue. The new multi-piece fireboxes from KJ are higher/deeper than the BGE ones, so they got rid of the fire ring. If you have a fire ring in the BGE, then the hyperbolic insert DOES fit, but you're limited on options what goes above it (not much room.)

The top plate of the hyperbolic since about an inch above the felt line. The two or three level D&C system does not fit (you can't close the lid). The Woo and the Smokeware grid raiser do not raise the grid high enough above that plate. You could use some long lag bolts and fender washers (placing them in just the right spots on a dedicated grid), but you're going to be pretty high in the dome at that point and I don't know if you can close the lid on a 18" grid.....might have to drop to the 15", but then the bolt idea isn't going to work.

Other option, BGE makes (or used to make) a lower profile fire ring for the large.....for use with the three level spinning rack. I believe that system got discontinued when the Eggfringer came out, so I don't know if the ring is still around. If you had one of those 2" fire rings, then you could use the hyperbolic with some sort homemade raised grate and possible the 2 level D&C that comes with the classic Gen II. You're going to be into this set up for at least $300, so not sure sure if it's worth it.

My Big Joe III's haven't shipped yet, so when I get them I'll report back how everything works in the XL. With how short and squat the XL BGE's I can almost guarantee it's not going to work in there without pulling the fire ring altogether.....then it's going to be the same issue of getting a grate to stand up in there.

Do you think you could remove the fire ring on the BGE and put the hyperbolic directly on the BGE large firebox?

I rarely ever load my awesome and superior Rockwood past the transition between the fire ring and fire box. There’s at least a good 10 hours below the ring imo.

@stlcharcoal did you ever try and fit one in a xl?