Can't help but think this is an accident waiting to happen.
Either under power or just when turned by hand, I can see a digit going missing at some stage from an inquisitive oxygen stealer poking into one of the rotors.
I have seen an accident happen with our display M250 engine which has covers. Someone found a small opening which if he bent his finger the correct way, he could turn the compressor rotor. He forgot he needed to get his finger out of the way and was not quick enough.
Maybe some perspex covers or safety guards would not go amiss.