'more room to work and less chance of bumping the controls'.
Is that it?
Because, I've never felt short of room (the seat moving helps if I need a wee bit more for some reason) and as for 'bumping' the yoke-must have bumped it a few times in 10,000 hours worth? No major issues so far.
So, what's in it for the pilots?
B**ger all as far as I can see.
