I bought some High strength servo output arms from Horizon, stock No's; DUB 674 & DUB 673, at about $9 for a tree of 8 arms, not a bad price. But by the time i had paid P&P, & the UK Customers & Excercisers (robbery without violence), had got their sticky little mits on them & not only charged VAT, but import duty as well, & then had to pay the Post Office in UK £8 for the service of paying the vat on my behalf, they have worked out at about $5 per arm.
I dare not use them now. Cheers. Ray