sudomod

Does anybody have a link to the correct size tactile switches for the L and R buttons? It's the last part I need I just can't seem to find them in the exact size listed on the wiki

generic 6mm tact switches (that return thousands of hits in amazon/ebay etc.) are the ones. depending on how much button you want sticking out, something like these will be fine:
http://www.ebay.co.uk/itm/2-100-Pc-Mini ... 1897325466
or I have 4.5mm tall and the button just protrudes enough to be comfortable (for me...)

BTW: here it is in the wiki:

Tactile switches: 2 for start and select - these 2 will be pre-attached to Helder's board - (2.5mm tall including the actual button, 2mm tall without, 6.2mm x 6.2mm base), and 2 for L/R (5mm tall including the actual button, 3.2mm tall without, 6.2 x 6.2mm base)

If you're in the UK I can drop 2 in the post for you, just PM me

As above. I'll be opting to snip 2mm off of my switches and round them off. More filing

Anyone know if these buttons could work for L/R: https://www.adafruit.com/product/3101 ? Maybe with a larger drilled hole in the back?

They are a fair bit bigger so probably not