Hey latewood is there a Harbor Freight tool place around where you live? If there is you may want to pick up a PVC weld tool from them. You need a small air compressor with it but it does work. I have 2 of them and I use them all the time, you designs will change once you learn how to use one. You will save money too in the long run; you can weld pipes as drains and not use sink drains. Save you 5 bucks each time, hint, hint.

You may want to wrap your tubs with water heater blankets there is a silver one with plastic bubble wrap as insulation that works very well.