Good idea, Lavender, especially for the 'summer'.
It suggests using seam tape and I bought some iron on seam tape from ebay, which was super easy, but now I've used it I realise that I could just have easily cut up some thin iron interfacing into strips.
I did also follow their instructions for a very fine zig zag for the seams.
merchantandmills.com/products/cotton/cotton-chambray-dark-blue/
This is the one I got, though I did originally want the other one that is still out of stock
I finished the racer back dress last night and I'm wearing it today over a long sleeve t shirt, and might also go and put leggings on it a minute.
This is very straight up and down so I did take a little bit in at the waist and slightly shortened the shoulder strap and widened it . I altered the curved hem seam at the back, but I think that might have been a mistake. But overall, a nice quick comfortable dress. I made it out of a 1.5m of the laundered linen.
I've come to the conclusion that I think all the M & M patterns have been deliberately designed so we can alter them to how we want - I think that is part of the ethic ie you become your own designer for your own body type and taste. This, however, is also a testament to the good overall basic design of the their patterns.