sagging rear

Does anyone know what rear springs i can throw on my new t6 lwb highline t30? Its always loaded and sagging a bit on the rear, im tthinking 3 grey paint mark springs from a t32 but I've read people saying 4grey paint marks? Has anyone done this on their van Cheers for any help!

We've purchased our very first camper van conversion (T6 LWB, T30 Highline), due to collect in next few weeks and we're looking to add a few features prior to collection. One being new alloys and lowering the suspension. The van has standard 16 inch alloys at present, and we're looking at...

I have a T30 Highline SWB 150DSG Panel Van which has been prefessionally converted to a full blown camper. In addition I carry 3 bikes (about 40Kg) on a rear door mounted rack and tow a boat trailer with around 30Kg of down force. With this set up a large proportion of the weight is...