Urgh, cheers mate. They won't be ready til Monday so I'll have to go in again tomorrow and tell him. I just don't want to ask him to keep the selvedge the same and for him to go "yeah I know, I'm not an idiot", think I'd be too embarrassed to ever pick them up.
I did go in the next day and told him to keep the selvedge line the same. His reply? "yeah I know, I'm not an idiot". Got them back today, of course he's fucked them up. And I think he misheard me with the other pair of jeans, when I said I want them to be taken up he must have thought I'd asked him to turn them into denim shorts.