The Vodnik article is indeed useful. Even so, he leaves out some things, which to be fair, almost everyone else misses as well. The most obvious of which is the welds between the large armor plates attached to the sides of the hull. They’re very easy to remove. then you just scribe lines, inside and out, A literal two minute fix.
The other one takes about the same amount of time. Once you know it’s there it’s hard to unsee it.
Other than a few other minor things, follow that guide and you can’t go wrong. Of course, if you get the above mentioned aftermarket parts I linked to, you can save yourself tons of time,.