Much funnier, however, is the idea of the Apothecary Dreadnought…

A dreadnought class narthecium would be a thing to behold…

"HOLD STILL BROTHER."

*crunch*

"DAMNATION. NOT ANOTHER ONE."

Decessor said:

hahahaha

You'd need some Mechanicus connections to get some mechandendrites to make that remotely plausible, which runs you into a whole other obstacle. I know that a Techmarine in the Ultramarines novels got Dreadnought'd, and they just retrofitted his forge to work with hit, but for him, alterations to his chassis would likely seem an obvious course of action, being a Techmarine and all. Other folks… might object.

But if you need an armor plate bent back into shape, he'd be your man