So are Italian spindles the same dimension as BSC? I'm been messing around with this Tomasso and it seems to me like the non-drive cup goes a couple mm farther into the shell than on my BSC bikes, leaving not a whole lot of thread for the lock ring to grab onto. I just pulled a spindle of the correct overall width from another BB I had in the bin, never bothered to measure the interior dimensions.
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Hard at work in the Secret Underground Laboratory...