[@BCTheEntity] OK, read the bio, and I do still think you need to tone down the 'nearly killed' part. 'Injured seriously' is understandable, but nearly killing a full grown marine as a 9 year with a self made autopistol? Unless he was a true protigy(which you have not made him out to be) the weapon was most likely a one or small number of shots and hastily made weapon. He was 9, it is not going to be as good as a professionally machined autopistol.

ALSO, THE WEAPONS, are indeed WAY to much. 2 bolters, a lascannon, a plasma cannon, atomizer cannon, all of which are held up by mechatendrites? Just... no. ONE Lascannon can be held by a space marine, same with Plasma nd atomizer, ONE! They are just too damn big! Most tech harnesses have a flamer and a plasma rifle equivalent, even for forge masters. We are not so powerful a chapter for this to be even REMOTELY possible.

Look at your Superiors, you should not be MORE powerful than them, and CERTAINLY not more so that the chapter master.

What you have makes him better than a DREADNOUGHT who only has ONE of those weapons!

That needs to change, immediately. The rest is LARGELY ok, just generally? Tone it down a bit. We are not unltimate heroes of the Imperium or Chaos lords, even the chapter master isn't crazy. He just needs to be made more realistic in general, you really should run things by me BEFORE writing thwm on youe sheet. As is... some may consider him a Mary Sue... but I am willing to let you eedit it as you appear to be a fine writer. Please, fix what I mentioned though. And generally, backstory needs to be toned down just a bit

Also, fixing the plasma overheating problem entirely is... too much, the admech have been trying to do that for centuries to no avail, 50 years? Alone? Just no, he could have improved it somewhat. The best criticism I can give is look at the chapter master aand captains. If you are doing shit/toting weapons/being more amazing than them, why aren't you in charge? If your more powerful than all your superiors, something is generally wrong