the TF2 is relatively easy to install if a guy is mechanically inclined, and can read and follow instructions.
keep everything organized on the bench, and make sure to keep the parts CLEAN,CLEAN,CLEAN.
pay close attention to the internal ball positions, and you are home free.
a FSM photo of the VB with an exploded view of the components helps a lot to the first time builder as well.
it can be intimidating, but it really is one of the easiest valve bodies to work on.
just take your time, and you will do good.