The look Spinister gives Ratchet is a genuinely baffled one.

Not enough materials to fix it properly?

He looks at the junk pile, does a little mental calculation and then looks back at the Autobot CMO again, the look of bafflement increased tenfold. Sure, the end result wasn't going to be factory perfect, but it was better than walking around without half a leg in an uneasy truce.

"So why didn't you install a basic prosthetic at least?"