I had an old MTB frame given and decided to put all the spare bits I have on it...
My 'engineer's tool kit' (hammer) was liberally applied to the chain-side stay to stop the chain wheel scraping...
I had to add a chain tensioner as the frame has straight drop outs...
So, add a link, chain to long, take it out and it's to short...
I want to add my Northroad bars but they're on my girlfriend's bike, she likes them and won't let me have them back..