Powering up a new avionics suite for the first time is a big milestone in any build project, with a lot of work to get to the longawaited stage that brings a kit to life. To capture the big event with RV10 and EAA166 member Mark Welch, EAA166's Larry Anglisano had cameras rolling for part of one this chapter Build Spotlight, while Welch had some words of advice for other builders.