I need a new trolly for my 88'zipline.

I found these two that I could use to replace my old heavy duty plastic trolley. http://ziplinegear.com/index.php?productID=339 http://ziplinegear.com/index.php?productID=364 Are these good ones to use for backyard zip lines? I want one that is reasonably priced, is stainless steel, will not slow down for a long time and is very rugged. My old trolley is very scuffed up on the nose of it and it seems jerky and slow.

[Turbo]

use a clothes hanger

[gouldy]

To quote Jayman from another topic, use a plastic bag and make sure you tie it tightly around your neck.