if it is of any help (never started a sentence with 4 two letter words before!)

I would be willing to attach each of said metal to my middleweight on different sides. If a spinner such as shredder wishes to then test each material in turn, they are welcome to. this is not a challenge to shredder, this is an offer of a machine (which can have ballast added to simulate 100kg if required) for specific tests once the main competion at enginuity is over. The 4 pieces of material would need to be delivered to me at least 8 days before the event to give me time to attach them, as I am a very busy bunny that week.

if Paul/Ed/Sam/Chris would like to discuss this option, the offer is there to catastrophically test these materials on a well built, solid chassis.