[rohrmann]

I believe with your newer rig that you have the new seamless roto-cast holding tanks, and these are supposed to be much less likely to split like the older two piece ABS tanks. I added supports to our older tanks and do not worry about a tank failure, but when it is needed, we wait until the toilet burps. If you are building a house, it is likely you may have a porta-potty on site, and maybe you can pay a little extra to have your rig pumped out when they service the out house.