hi,
about the leds, i went for something akin to the white leds (CLM3C-MKW…) mentionned in the docs.
They are very bright, but with the /grid/led/intensity command one can choose full brightness for daylight/direct-sunlight use, or dim for late night work.
The most important thing for building the kit imho is a soldering iron with fine tip (~1mm) and sufficient power (15W was alright).
Being methodic it took me three hours to get everything done, with no prior experience in smd soldering (i made plenty of tiny audio cables, though). hf!