This is the chest mount I bought. http://www.amazon.co.uk/gp/product/B00KU70D4Q?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s01
I turned the camera upside down on the chest mount to get the angle correct then flipped recording it in the settings in camera. To get the correct angle i found was easy, standing on the bike in the riding position and looking at it.
My settings were default apart from changing quality to fine. I did add some contrast and saturday to the footage in iMovie, but only a little, which i might not do on the next upload.
Youtube and/or iMovie has dropped the quality a little, i might try to export then upload using youtube instead of share through iMovie. I was using a Samsung 8gb Class 2 card as i couldn’t find my 32gb Sandisk Class 10 card, which is what I use in my Contour camera, ive now found it, typical.
Hope that helps.