for the chairs check out this they are very close but not the same and the Helinox are much nicer IMHO
http://www.expeditionportal.com/forum/threads/32480-The-Great-Camp-Chair-Debate/page4#127
BOY the shortening the legs thing is still in the works

hahaahahha
I tried to just pull the black level bottom plugs out but they did not come out ? and kinda afraid of ripping the plastic apart the threads are just plastic so did not want to rip or strip them out with force !
so I ended up just heating up the pipe a bit and letting the plastic get soft and they came out ? then standard pipe cutter the first one I heated a bit to much and the black plastic thing to level the legs is a touch loose ? still holds but might pull back out and throw some kinda epoxy in then reinsert it ?
the 400 legs are still short ! I have a full set cause I like that height but you cant get under the table and my wife and I are OK but the kids 4 and 9 like to be under the table to eat
SO came up with the 570 length again so the drop height adjusters would work which is a major thing ! also 570 is basically 22.5 inches and the regular 660 legs are basically 25 inches a standard seat height of 16 inches the helinox are 13.5 so the 2.5 inches worked out perfectly ! kinda ironic really and glad the helinox are 13.5 inches not any lower

with the 830 table height legs in the frame and the height adjusters you use the bottom positions with the 570 legs

again glad the math of 570 worked out cause its the perfect height for those chairs ! almost how my magma grill fit into the IGT the chairs work perfect with the system for a truly compact but super comfy setup
what you see in that photo where you see both sides is the frame(and bamboo table to right) has 660 legs and the bamboo on the left has the custom 570 height
I do have 4 of the standing 830 legs but I was using them on a 2 space table but in the future I am going to be using them on the cooking frame! and buy 2 more long 830 legs for the bamboo prep table area
feel free to ask anything else or if you want other pics etc.. ?
Nice work. REI have an identical version of those chairs?
What was the process for shortening the legs? I may consider doing the same thing as it would fit our kids and low chairs better.
What size legs are on the IGT frame?