are these any good the expo discs are very expensive these seem reasonable
http://stores.shop.ebay.co.uk/LinkD...dZ2QQ_fromZR10QQ_ipgZQQ_sasiZ1QQ_sopZ1QQ_vcZ1
http://stores.shop.ebay.co.uk/LinkD...dZ2QQ_fromZR10QQ_ipgZQQ_sasiZ1QQ_sopZ1QQ_vcZ1