First of all mate slap yourself a flipper on that and come and battle.

Second... the ali you used will be very weak indeed at .8 thickness. Stainless will be much stronger. I wouldnt say you wont dent it still tho...with 70kg behind it you will get some dents with .9 stainless. i am sure you can bend thicker grade. Maybee try 1.5 thick and you will have even more strength.

Looks good by the way.

Shane