Perhaps some of those field officials, who have never been inside a "booth", might benefit from some generic considerations most ECOs have little, if any, control over.
At the HS level, in general, no two booths are identical:
a. there is a variety of controllers, some older, some newer and like opinions, each is a little different.
b. some offer unobstructed glass walls, MOST have windows, that come with pillars, some a lot wider than others, that create temporary blind spots that need to be "worked around".
c. field lighting is unique to each site, some are great, most suck(at the HS level).
d. Many are high enough above the crowd, to avoid fan obstruction, many are not. For reasons known only to God, fans on the top row ALWAYS stand, if it's raining they ALL come with umbrellas.
e. Many booths get crowded (authorized/unauthorized) people, that can cause (momentary) distractions, that ONLY happen at the worst times.
f. Every now and then, clocks, or controllers, decided to act on their own (running your own back-up clock is a sound idea).
g. Coaches in the booth ask as many stupid questions as coaches on the sideline.
h. Wing officials, under 7'2" tall, get lost from sight, intermittently on the far sideline in front of the team box and are TOTALLY INVISIBLE on most near sideline team box areas, rendering most, if not all, incomplete pass signals given below the shoulders - invisible (SO IMPORTANT for middle field officials to relay Signal 3 and other relevant signals along both sidelines).
i. Time Out signalling, please don't be subtle, or stand on the sideline. Make your signal a "Big Deal" while moving away from sideline or players. Look at the clock as you signal. (REMEMBER: neither coaches nor players can ever CALL Time Out, they can REQUEST that YOU call Time Out, so it starts when YOU signal, not when THEY request (or started thinking about requesting).
j. Just as "Football is a game of inches" is a misunderstood myth, so is precision to the 1/10th of seconds.