Ok good. Not sure what you think is vague.There's been hundreds sold so far and no-one has complained, the only feedback I've seen is how nice they swim. If there's something missing there then tell me so I can add it pse. That pictorial took the longest out of almost all the kits. I always try to make sure it's not "vague" so there's no trepidation
This is however not a regular turned kit, it's as I show on the site...for "advanced" builders. It does require some thought and time put into it beyond what many of the kits on the site are. The intent is to give you the "jumpstart" you need by giving you the shaped body through drilled etc so all you have to do is shape the sides.
There is a guide there to get you to shape, trace it on top and on the bottom and then sand to the line.
Easiest way I've found to shape them is with a flap sander and a drill press or drill. There isn't any "specific" tool to do it. It's meant to be done with a sharp knife by whittling or by sanding with progressively finer sandpaper. If your a wildman and take too much off then there's nothing I can do to help that
Seriously take your time, eyeball it so it stays symmetrical. As it says in the pictorial I do not recommend you change the bottom, that is through drilled and the through hole is very close to the bottom existing shape. You should only be changing the vertical shape on each side.. It will swim in the block shape it is right now...anything you do to change the shape (keeping it similar to the pictorial) is only going to lighten it up and make it swim better. Just take your time and go slow.