Valiant attempt mate, but if it was that easy I am sure mosmatic would of done it by now.
It would need substantial strength in the 'head' of the cover to maintain hub / spray bar plus you always run the risk if a user accidently hits any raised flags etc. Goodbye shins
On our old kersten one of the guys sucked up a metal bracket around 2" size, bracket hit the impellar and shot straight thro the thick plastic casing
. Luckly no one was hurt, casing was destroyed. Sure same thing would happen if turbo snapped off