All this is killing me, although as a Vel owner It doesn't effect me one bit, However because of my enquiring mind, please see below:
I have spoken to SvTech today, as a general enquiry. As yet, they haven't increased the plating on a T6 yet, but did confirm that they had on T5 T32's and other T30's, T28 etc etc. They have found 200(ish) kg of extra load going up to a
T34 as it where, as just a paper exercise for £260+VAT(I think), and around 10days lead in time.
In fact with Air suspension on the rear they have got the rear axel up to 1800kg.
Also they mentioned about the kerb weight and payload can be a point of interest with HMRC, VW quote a User Payload allowing for a Mass in Running Order, i.e. allowing for the weight of the driver and a nearly full tank of fuel. HMRC may allow an actual Payload i.e. you may be
able to add a further 150kg ish to the User Payload to get an increase actual Payload, which maybe all people need to get the
magic >1000kg payload. All you may need is a weigh bridge ticket for the empty van (no driver, low fuel etc etc), and then compare that to your gross max weight, and it could be over the 1000kg - Bingo
SVTech have said when they carry out the calcs a big aspect is the capacity of the brakes, so the 17" chassis with larger brakes may be more upgradable as a paper exercise, than the 16" chassis, but this is pure speculation on my part.
Not sure, but with Air ride a
T35 may be possible. 1710kg front+1800kg rear= T35
Because I am not in the market for this upgrade personally, I am conscious of taking up their time ,so I haven't gone any further.
What SvTech did say, is that they offer to find customer specific bespoke solutions to payload problems. They are not in the market to offer to convert all T32's into T34/T35, as this would be discourteous to VW who deliberately choose not to offer a T34/T35 directly into the market place.
So out of respect to their position I think it is useful for us to know about their services, the figures I have quoted are really only information for people who may have a specific payload problem. And I would urge people not to bother SvTech unless it is a genuine enquiry!!!!
Hope this is of some use to somebody