“Is worth £400+”
Half of that is agents mark up and freight costs. Al cost £2, cut to size, bend, punch mounting holes £4. Knowing size of shield, how to bend and where to put holes, £194.
I’d consider using larger stainless steel wasters. The new Al ones won’t last long and then you will have to empty some more cans.
Many years back it became a sport at cricket matches to crush in one hand the empty can. So many antics were associated with this ritual that it became entertaining and was shown on TV in between ball deliveries. When the ZL’s attempted to do the same they were amazed at the strength of the VKs until they realized we had Al cans and theirs were steel.
Snakes have been known to stick their head in a can (baked been type with top cut but not removed) and get stuck when they tried to reverse out. The lid closed tighter the more they pulled. Doesn’t work with modern beer cans. The discovery of dead snakes with their heads in bean cans led to stories about backed beans being poisonous. .(Added to show some on-topic content).