Hi Guys.
I've been searching the net for a while now for some reasonably priced linear bearings and stumbled across these type of systme on ebay.
The only down side I can think of with this soloution would be weight. They do not specify the weight but they look like they would be quite heavy. This would make trekking with them a bit of an ordeal.
There are loads of these on ebay so dont be shy if you think they are a good deal to jump in and buy this particular one.
Thanks link below.
http://www.ebay.com.au/itm/IKO-LWLF4...item3f16938ba1