[Closed] Wrong BB - Chainline issues

OK, to cut a long story short, I got my old Rock Lobster frame out of the basement and decided to resurrect it. I took it to my LBS to have a new BB fitted and confidently ordered a 119mm BB. I picked up the frame last week and when I came to install my Middleburn cranks I noticed that the old BB was in the box and it's actually 113mm..

My intention is to build up the bike over a few evenings and then see if this mistake causes me any chainline issues - but even without a chain fitted it looks wrong..

Should I give it a go?

Or give up now and take it back to the shop and tell them I'm an idiot?

Any advice appreciated..