I don't rely on the count myself. I only inquired since I'm still waiting on some more drop checkers to arrive.
One thing I didn't plan on was check valves. DOH! Not something I had to worry about with DIY since the bottles were right next to the tanks. I went to turn on the gas this morning and all the tubes were full of water. Will be making a stop to Petsmart this evening to get some check valves.