Good words, keep it up, not sure I want a twin of the 291 right now, but then again there might be more merit in that.
Our trunks down here can be a bit large, worst I generally deal with is around 40 inches or so.
After a day of cutting oak in the heat, cutting birch would have been nice. LOL.
First birch I ever cut, I almost cut my leg as it cut so quickly.. LOL