Since when did 13mm for a shaft become a "standard" or was considered "full size"? IMO its pretty stupid to order a custom cue with full size shafts knowing fully well that you're not going to play with them - but not getting them would affect the resale value.
As far as I'm concerned, a shaft no matter what diameter as long as it was turned by the cue maker is ok.
As far as I'm concerned, a shaft no matter what diameter as long as it was turned by the cue maker is ok.