Yes it is between 147 and 20000 Sunfish. I have heard about 16,000!!.
It is interesting that CASA did not see fit to highlight that. Would make their guy look pretty deficient I would think.
All your other questions are valid.
The experience of the chief pilot is a question that cant just be thrown away because he had access to others with experience. You then have to start down the road of exactly what was he doing and how is this delegated duty working. Just because there is provision in the regs to delegate your duties you cant delegate your responsibility and the fact is this guy knew F??K all. I'm not sure that is the issue here is experience on type. The issue here is company culture and that lies with the CP at the end of the day.
The fact that he is now with CASA says it all. What a disgrace.