The neck and bridge positioning juggling act is often a case of what works best for you, and what works for a particular build.

For my YB-4 I first positioned and attached the neck. Once that was finalised I could work on positioning the bridge for scale length and alignment. Using clamps with strips of wood can secure the bridge well enough to get your position sorted. Note: I’m using an aftermarket bridge, so it’s a little further back than the stock bridge would sit.

Alternatively, you can just clamp the neck in place when you’re doing the positioning of the bridge etc. That way you can adjust either ‘end’ to fine tune the alignment of the strings along the neck and with the pickup poles, scale length, bridge adjustment range etc. The main thing is to take your time, triple-check all your measurements and alignments, post photos if you’re unsure about something… and always check and mark your drill bit depth before drilling.