Just did a pair of mine with the paper templates printed off TGR's 'Mount your own fucking skis' thread. Key things were:
Make sure your printer prints the templates at 100% scale. Measure after to make sure.
Accurately measure and draw on the ski centerline (lengthways)
Mark your mount point. Measure from the tails cos you cant always trust the top sheet markings.
Punch holes in the templates at your BSL (So you can see your lines through the hole)
Tape those templates down real good.
Measure again and check centreline
Smash a centre punch into all the screw hole marks
I took 3.5mm drill bit, wrapped a piece of electrical tape around at the 9.5mm mark to judge depth and went for it.
Used a large bit just to counter sink the holes a little and a squeeze of regular wood glue.
Next time i'll use better tape, the masking tape came unstuck a few times and caused some of my holes to be a fraction out of alignment. Thankfully I noticed before i put drill to ski.
Also I didn't go quite deep enough on a couple holes. Measure that 9.5mm carefully and then trust yourself to go full depth else you'll be taking bindings off again and re drilling.