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Yes mate: I'm using a pair and also fitted some to a bike I built for someone, both of which I got from Hubjub, who are the cheapest I've found even taking postage into account.
The finish could be better in places: evidence of the milling process in the flutes and on the back of the arms, but you'd only be miffed if you were daft enough to pay BLB three figures for the privilege of having them scratch their name into them.
If I remember correctly, it's not the whole area where the ring sits on the spider, just inside the corner: rather than being a crisp right-angle, some are more like 45 degrees; nothing two minutes with a Dremel couldn't sort out. Neither of the pairs I bought were affected.
Perhaps @Drew_Hubjub can explain it better.
All in all, I'm more than happy with mine and have had no complaints from my friend either.
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Scilly.Suffolk
@Yukirin
AND HAUL
Are these the same as Andels?
http://hubjub.co.uk/index.php/store/drivechain/single-speed-fluted-chainset-detail
Which look the same as these without the engraving as the HubJub description suggests?
http://www.bricklanebikes.co.uk/blb-super-pista-crank-silver
"Note: there is occasionally a slight issue with the cranks and non-Andel rings. There may be a slight step (0.5mm or less) on the spider of the arm which does not affect the slightly larger diameter (inner bore) Andel rings but may affect others. To fit certain non-Andel rings perfectly flush you may need to modfiy and remove a very small amount of material from the step or the inner part of the chainring."
So the step between the arm and where the chain ring bolts on is slightly too shallow for some rings making them stand half a mm proud of the arm?