All of the lightweight stoves are fairly finicky. Takes a lot of trial and error to figure out what works and what doesn't.I have not had the best luck with the Lite Outdoors 18" Stove. There is another thread started by another member discussing the same issues I as well as others have had. Its just to damn finicky in my opinion. Lots of others have not had any issue with them though. I do think its a well built product and I like how small it packs down. Much smaller than the sq box type models out there.
Hey zap, here a great video from John at Bearpaw Wilderness Designs giving DIY directions for installation of a stove jack. Good luck and enjoy the finished product.