I have an Advantage II-T serial 26*** circa 1990, with the pipe and the box for the burn pot. I just ordered the retro-fit ultra grate kit. The description of its benefits seem to focus on solving issues related to ash pan leaks and a better fire. I am curious how that will translate into efficiency and heat output of the stove, the original pot seems to clog up pretty easy with ash, and it also seems to wide and the edges seem to struggle to burn well. What kinds of improvements have you guys experienced? Was it night and day, or just a minor improvement?