I started taking the parts out of the box last night and was a little confused about something... The "shoe" that they supply is simply a piece of angle iron. Anyone who's done any metal bending knows that in order to make a 90° bend, you have to go a few degrees past 90 to allow for spring-back. The nature of angle iron compounds the issues to a degree by having a bit of thicker webbing in the inner corner. From this, thin stock will never have a sharp bend. I assumed the shoe would at least have a bit more than a 90° bend. If any of you have one of these units, is this an issue? Can you bend a full 90°? I know they sell an adjustable shoe that can bend sharper than 90, but I'd think the basic unit should at least be able to bend a solid right angle. I might assemble this as instructed, but I'm thinking I'll need to build a drop-in shoe with a sharper and steeper angle. Thanks in advance.