I have a Connect t220 not the crew van, a very good van for window cleaning.I have 350 liter tank fitted.My van has a factory fitted steel bulkhead.I have cut a hole through to take my poles. AS far as the drive it takes the load well and handling is very good. AS far as fuel goes, its a little rich on the fuel, but in general a good van. I do think they are the best small van for window cleaning. Using it as a crew van and fitting a tank might be a little cramped as you will be fitting a tank father back after the back seats on the axel so it might have to be a 250 liter tank. I have tried to utilize the space between the tank and the roof well because they do have a lot of head room.The manufactured well and don't seem to give much trouble, I have had none at all.
The payload will depend on the model APROX.t200,= 625kg t220=825KG or t230+900KGS
p/S THE WATER IN THE FOOT WELLS IS A PROBLEM BUT I WILL BE SEALING THE BULKHEAD IN THE SUMMER.