i am going to build a 20x 30 cabin which i plan to use log siding on . do you reccomend any type of insulation over the sheating, i was just thinking of using tyvex. can the siding be installed with a nail gun ant hte last thing is what do you reccomend for a finish, do i have to stain the wood and then seal it . do you know of any instructional videos that would help. i understand the tongue and grove and how to install but im unsure about how to do the outside cornerd and the window trim t