Regarding the Prefect, finding a seating position and posture where you can both move your head and achieve full left/right stick is a challenge as it is. Blessed with space it is not.
I was interviewed for the EFTS job. It was all going well until I sat in the aircraft. I'm quite tall, but not overly. However, I couldn't sit in the Prefect without the helmet touching the canopy. I never had an issue with the Chipmunk/Bulldog/G115/JP/Tucano/Hawk. This is a major limitation of this aircraft. I gather it's something to do with the vertical shock absorption of the seats for civil certification.