Just rang hpc, they have some gears the same MOD but twice the thickness made from EN24 in stock, that will take 4 times the tourque should be a direct ish replacement. Also buying a modified astroflight 40 from grant cooper. still un decided on weather or not to change the ratio on the final stage to slow it down with abit more power.

Shrimec wont be done in time for tag teams now either way as i start my new job on monday.. so less time to fiddle about with robots