I have a deep respect and appreciation for those out there on this forum willing to answer direct questions at any hour, any day 24X7.  I also saw a number of free format postings for camaraderie, and thought what if someone combined the two and created a thread for the experienced hobbyists out there to chime in with a single important construction or technical tip to help the Newbies avoid problems they don't know about yet?   We started it off by identifying a helpful way to mark controller