I have a 3950 and will be putting a Vesta DWV335BBS in the cabinet that was originally made for the washer/dryer. Since I put those in the garage, I have a nice spot, with plumbing and power already installed.
Wife wanted it under the sink area, but the cabinet layout and plumbing is very friendly.
TV: 2015 F-350 DRW, CC, 4x4, with 14k GVWR package, 98 gallon TransferFlow Aux Tank, Timbren Shocks
TH: 2014 Voltage 3950, Sailun S637 all around