You will need per trapeze

1 x Trapeze handle - http://www.ronstan.com/marine/product.asp?ProdNo=PNP171R



1 x Trapeze dogbone - http://www.ronstan.com/marine/product.asp?ProdNo=RF48B



1 x Pulley - http://www.ronstan.com.au/marine/product.asp?ProdNo=RF20101&admin=admin



1 x Tie Ball - http://www.ronstan.com.au/marine/product.asp?ProdNo=RF1318R



2 x Sister clips - http://www.ronstan.com.au/marine/product.asp?ProdNo=RF536&admin=admin



2 x Thimbles - http://www.ronstan.com.au/marine/product.asp?ProdNo=RF482&admin=admin

[img]http://www.ronstan.com.au/images/product/RF481.jpg[/img]

3 mm Dyneema (Marlow D12) length from hounds to about 700mm from chainplate (??) - http://www.marlowropes.com/public/pageManager.cfm?page_id=155

[img]http://www.sailboats.co.uk/images/products/medium/58079.jpg[/img]

4 mm Spectra - http://www.whitworths.com.au/main_itemde...tAbsolutePage=1

[img]http://www.whitworths.com.au/products/180414_superbraid_lg.jpg[/img]

Use 3 mm dyneema instead of wire. Splice a loop around a thimble at the top end.
How to splice - http://www.marlowropes.com/public/pageManager.cfm?page_id=208

[img]http://64.78.32.235/assets/Adjust5.jpg[/img]

Second thimble, open slightly and place on the pulley.
Thread a trapeze handle on the other end and splice on another thimble with pulley attached.
Tie the 4mm spectra to the trapeze dogbone. Pass the other end of the spectra through the pulley, thread on a tie ball and tie on a sister clip.
Clip second sister clip on and tie a length of 4mm shock cord to it. This gets passed through an eyelet in the tramp, across to the other side where it will come out and join onto the lower sister clip of the other trapeze line.

I would suggest going down to a sailing club and asking someone to show you how to set it up.