get a 3 inch square of 3/4 ply with a hole the size of the fork steerer drilled in the centre of it,place on top of lower headset part ,then gaffer tape tape the steerer thread (to protect it) then repeatedly drop a foot long piece of scaffolding tube down the steerer on to the wood.it will seat the race cup nice and squarely
get a 3 inch square of 3/4 ply with a hole the size of the fork steerer drilled in the centre of it,place on top of lower headset part ,then gaffer tape tape the steerer thread (to protect it) then repeatedly drop a foot long piece of scaffolding tube down the steerer on to the wood.it will seat the race cup nice and squarely