I sent them off to göteborg manufactur, haven’t got them back yet so fingers crossed they look alright. Yep they do it on the inside, you can only do a few cms or it will start getting uneven.
Keep us posted! I've got a pair of Hebtreco trousers that might need taking in a bit. There's a knife pocket on the side of the leg which complicates things. Gonna see if I can do it myself but it might be a job for someone with the right kit
Do you do the work yourself? How do you deal with the selvage? Undo the stitching on the inside of the leg instead?