I can vouch for K&E. I've been in there several times with issues I wanted to solve. This last time, I wanted an nmo mount with an L bracket. He took about 20 minutes to help me pick out the right L bracket, select the NMO mount, show me how to connect the mount to the bracket, and pack it all up for me. I knew most of what he was showing me, but it's the effort that counts.