I've been building LPR for a long time. When I started buying LOC kits I didn't even look at the instructions, I knew how to put the pieces together. I made modifications to incorporate my own baffle design for motor ejection, my own shock cord mount using eyebolts, and my own motor retention using T-nuts. I have 5 rockets capable of mid power and high power, 2 were kits but 3 were scratch built using LOC parts.
I'm going to agree on this point. Having built many rockets in the past, I found that LOC's instructions were fine. I can see where they might be a little sparse on details for someone that is new to building.
Honestly, these days, I really just scan through the instructions for anything that seems out of the ordinary. The only thing I'm really looking for is the CP. If they can give me the CP I can handle everything from there. Like most that are building in the mid to high power level, we change so much stuff on these builds that the instructions are really not necessary.