I will go with the Grade 5 then. Unfortunately its flat on the top of the machine. I am trying to keep the same style as in Conkers 1 & 2 with the flat edges and sloped core section. The sides are 10mm 7075 and 2mm Ti 2 so no probs there, its just the top I worry about with the new axes coming in. Could also do with a 2mm Grade 6 plate for the base as atm it 2mm grade 2 but thats for later.