And those FI's have to be retrained otherwise you end up with students doing 3 deg approaches all the time.
Nav can be a bit hit and miss as well. They have some truely bizarre methods for diversions.
And they have to be checked out in xwinds, that can be entertaining to watch the first time they get a half decent one.
Saying that we have one part timer intergrated trained FI(R) at our school and he is developing into quite a good instructor. Personally I think its more to do with his previous instructing roles in other skill sets, and his personality lends itself to accepting opinion away from his own SEP training. He think's about what has been said and ask's questions then forms his own opinions.
Either that or he is being supervised properly by the unrestricted instructors and we are doing a good job at it
But 90% of it is down to his personality accepting that the way he has been taught is not the only way to operate an aircraft or the best way I might add.
Its quite funny now when he does checks on fellow ex OAT students. Critical is an understatement.