Originally Posted by
ryansu
Thanks for the info, I am running the 27 X 1 3/8 Sand canyons on my 87 Cresta GT and they come out to about 34mm and I have some Handsome Cycles 700 x 45 mm metal
mud butlers I got a deal on so we'll see how that all works out.
I'm expecting it will take alot of fussing, some cursing and a beer or two to get it sorted 
One thing I've learned after a bunch of the above... it's crucial to cold-set your fenders into the right shape early on so that you're not constantly forcing them into the desired position with your stays. Ideally, they should hang in the right spot before the stays are even connected.
I picked up a few back-copies of BQ recently. Vol 9 No 2 has some good tips from Jan and Peter about mounting fenders.