Welcome. I see you are new to the group. Suggestion - list the page number and step of the instruction so 'helpers' can find it quickly and look at the instruction. You will get more help that way.
14-02 Step 2 does not say to use a 1/4" drill bit to countersink holes. The directions say to drill a 1/4" hole in a piece of scrap. Then use that piece of scrap as a gauge to measure the diameter of the machine countersunk holes.
Joe