I am looking for a collet chuck and collets for my L1 fitting old colchester triumph. L1 is very hard to find. There are a few L0s about but no good to me. I don't want something with a backplate. Ideally 5C but they are even harder to find and silly money. There are a few Hardinge type 3L chucks around but the collets are very rare and very expensive. Then I came across the Jacobs Rubberflex. There are quite a few chucks on Ebay USA for sensible money. And the collets are fairly cheap and available in the UK. I know rubberflex collets have a great grip range but what is accuracy like? The whole point of collets is to be as accurate as possible.