Hurr, turns out my statement was false. I thought by tier 1 you meant tier 0, so i thought his strength was 250 lbs or lower. 600 lbs is actually a good estimate for a man of his build.

Anyways, you're free to make the character however you wish. In fact, the adapting and crafting part could be cool if put to use well. Just keep in mind that you'll probably have trouble finding opponents when only tier 1.