JJD,
If you are new to the boat and expect to be using the line a little its good to have one that is quick to use.

I use 8mm silver rope. A real cheap synthetic rope that to me seems a bit like flax. It does not seem to absorb water. I tie a knot in it every 12 or 18 inches.
Attached it to either each side of the front beam by popping on saddles undeneath. So the line goes from one side to near the centre of the back beam and then to the other side in the shape of a "V".
This line is kept tight by a 6mm shock chord that goes from the middle of the righting line to a pulley in the middle of the rear beam and forward to the striker post.

This will get you up the quickest because the line is continuous you can grab the lower section and pull in the slack and use it to pull yourself up onto the hull.

So when righting the boat you put the line under your trap hook to take the load.The knots stop the line from slipping when they hit your trap hook.
Lower arm holds up some tension and upper arm pulls in slack to move up to the next knot as the boat starts to come up keeping you at the optimum angle and not lying in the water.
If you need more weight outwards you can put the uper arm out past your head and bounce a little to get the thing moving.
Another way is same type of rope with knots but two of them. Going from front to rear beam with two pulleys and shock cords going forward to the saddle the rope is attached to each side. You have pretty good rear beam clearance on the Blade so you don't drag the "V" line in the water at all but some people just rather two lines.

Anyway there is often more than one good sollution to any given problem and over the years these have worked well for me, on a number of different boats, including the Blade.

Hope this helps.

Regards,
Phill