Last year I changed out my 20 plate HX for a bigger one, 30 plate I think. The other day I woke up at 5:00am thinking why didn't I hook the 20 plate and the 30 plate in series. The 20 is just sitting on the shelf collecting dust. Would this work? Installing the larger HX did make a big difference, so wouldn't 2 HX's work even better?
Thanks
Doug
Thanks
Doug