You also do 2 for £9.99 as I ordered them the otherday, the 2 bushes that go onto the arb I drilled out to 10mm from 8mm and left the ones that go onto the beam as is, it was still hard as fuck but finally got them on.

I think I know where the problem lies thou, the oem bushes are concave both sides so it slides in easier then as it goes through locks/holds tight on the otherside I don't think this would be a hard fix just a slight redesign of the bush to something like this;
I'm no Solid Works/CAD type designer so i quickly knocked this up on Paint but i think you'll get the idea:



Rich