On HDPE. Craigs machines like Gabriel and Saint get away with it as it's used in a 'lose" configuration. Meaning it can flex and bounce to its hearts content making it incredibly resilient.

If you use it in a stiff setup, as needed for a spinner heavy, it loses most of its advantages.

Ali, stay away from the 5000 series.
If you want to weld it, the 60XX series is the optimum , if bolting or riveting, even glueing are your possiblities, look no further, and 7075 is your friend.

Yes, it does cost more to start, but it will pay back very very fast.

Mild steel. If used well, and seen as sacrificial, you can't go any better. But again, fork out a tad more money, and get a lot more BANG for the buck if you go specialised steel.


Hardox, due its nature seems about perfect for our application.
Pity the new hardox 500 tubes start at 76mm diameter... If it was 40mm with a wall of 4mm , ideal for Beast/Tombstone exosceleton designs.