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Without going to get it out to check I am going to say four down each long side one central to each of the short sides and two on the ridge line at the quarter and three quarter points so it can be...

That was very restrained ebf. I can think of other parts of him that are flaccid as well.

You're a bloody worry.

Ebf I just use an army hootchie which has stitched in loop tabs and I tie about 2.5 metres of sturdy string to each loop using a bowline knot.