LokiWolf. Thanks so much for your response. Most of us DIY hacks really appreciate your wisdom on this platform.
Regarding my drain lines for my RXP dual cannister setup, I dropped one line from each of the two cannisters and brought them into the driver side front wheel well and put on two ball valves. I think they were 3/8". I had to adjust one of the ball valves a little higher after initial install due to a slight wheel rub. Makes it real easy to drain the stuff in the cans. I just do it with each oil change. Without this setup, it is a royal PITA to drain the cannisters the way they are set up to be mounted by the manufacturer.