I've read through your TH400 book a couple of times this year and watched a few video clips of tear downs and rebuilds. If I get the tools I requested as Christmas gifts, I will probably start a rebuild on my TH400, which is actually an ST400, in January or February. I have obtained as much information as I can find on the few items specific to the ST400, but I remain intimidated. I plan to take lots of pictures, even video of my tear down in case I forget which way something was located initially. I may send a photo and a request for advice if I get stuck. I hope you and your family have a Merry Christmas.