Originally posted by KevinS
Looks like the 710 one used M3 screws with a locknut just like the regular 710 bumper and not the 3,5mm selftapping screws like the Impact.
I prefer to use aluminum on my 705 there anyway. That way in a big frontal hit, the screws will bend or break before my precious 4mm chassis bends... 
Agree with you there Kevin.
