Ok, I see. Mr. Yoder runs both. I have enough usage that it's not worth it for me. I've been gone as much as 3 days and still have to add cold water to my shower when I get back. Like I said earlier, if I am gone for more than 3 days, I just run my tub for 3 or 4 minutes and I'm back in business.
If you already have a sidearm, I'd go ahead and add the plate. If I was starting out, I would do the plate and not worry about the sidearm.