I'm afraid I am missing a bunch of pictures, i had to use 3 different cameras while i was doing this, and one of them got lost. I'm pretty sure the missing pics are for things that I'll be covering in separate instructables anyways, so it shouldn't be the end of the world.
you will need...
16 or 18 gauge steel.
something to cut it with (i used a jigsaw)
a dead blow mallet(recommended)
a dishing hammer and dish
some form of ball stake
some form of T stake
welding or riveting supplies
a fabric measuring tape(ideal a regular one will work)
Step 1: Designing Your Pattern
to make your own pattern you will need to...
1] measure from the point of your elbow to just where the bump on either side of your wrist starts.
draw a line this long on a piece of poster board. add 1/2" or so to the end
2] measure the circumference of your wrist just back from where it bumps out draw a line about 2/3 of that length across your first line.
3] measure the circumference of your forearm at the thickest point. draw a line about 2/3 that length across the same point on your first line.
4] draw another line an inch or so back from your third line, it should be the circumferance of your forearm less an inch or 2.
5] play connect the dots to come up with the rough outline of the front 2/3 of your pattern.
6] eyeball in the 2 points on the back and then experiment with tape and paper untill you get it working how you like.
your finished result should still look fairly close to what i have here, just proportioned a little different.
once you have a pattern your happy with trace it out onto your metal and cut it out.
This pattern is meant to be welded, if you are going to rivet it add a 1/2 inch or so tab up the inside edge of one point for the rivets.
Time for the next step