"And is that a beam in the middle of the tramp running aft? If so that must be a real knee basher.

Bill "

It is a centrepole running from front to rear beam.
If you bash your knees on it you`re taking too long to tack .
Actually the trampoline should be quite tightly stretched across it so you don`t really notice it. It`s there to stabilise the front and rear beams, they are small box-section aluminium. With the addition of the spinnaker pole it helps to support the loads the pole transfers to the front beam as well. Some of the Auzzies have removed them with no ill-effect, but they sail solo and haven`t added kites, I would put the centrepole back if adding the kite if I were them.