[Jez]

try zinc alloy automotive weights as used by tyre garages.they come in 50g strips,5g pieces so you can weigh car to limit within 4g.each strip is self adhesive and if theyre good enough to stick to a car tyre at 100mph plus,theyre good enough for 3 1/2 lbs of plastic going over jumps.i sell loads of the stuff at tracks,if you pm your address i will send you some to try.if you like it you buy it,if not send back what you dont use.as for lead,wouldnt recomend as the ntda banned its use a few years ago due to its poisonous qualities.thanks jez.