Is homemade armor legal if it follows the specs

I’m very new to the sport and I’m also incredibly broke I’m following the imcf rules so I’m pretty sure i should be fine as long as my armor meets time period requirements and thickness specs for the material but I’d rather be sure before i commit to the sport. If I’m correct that I’m ok to make my own armor I’d greatly appreciate places i can find resources like templates and specs on the tooling and other things I may need

Edit: i wanted to clarify this yes I want my armor made from mild steel I understand its strengths and weaknesses but it doesn’t make much of a difference to me buhurt is not a sport I intend to compete in at a high level the most I want to do is smaller local tournaments and sparring I’m already a highly skilled race car driver and am working towards competing at the highest level in that sport so buhurt to me is purely for fun