I'm not convinced that 210's are safe , isn't there a turbulence penertration speed issue to prevent the wings clapping hands?
Biggest problem with the 210, especially on survey is not the wings clapping hands as is commonly belived, but actually the tail coming loose. All that weight in the arse end has a nasty habit of assisting in the development of cracks down the back in the attachment points and I have even seen it in the bulkheads.
If only we could all have PACs (with better seats) to survey in....dreams are free