[Gustav]

Yeah those are the shafts,actually they look pretty strong,4mm and hard anodised,i thought they come stock,not sure.They should be fine really,though no transmission part is ever really safe with a 22 series around.:027:

Edit;going to 8s would only add about 200g and add 1cm ish to the pack height and bring the amps down.A 2240/11 or 12 on 8s would run 60mph with ease and run cool with long runtimes.i'd aim for between 35000 and 38000 max rpm.