No Peter, they're the 4 seater conventional 4 leaf springs from Mulfab. I don't get much tramp on the Plus4/4 - maybe I'm not trying hard enough!
John - its a sheet of woven insulation from Agriemach, cut to size to fit between the brackets and wrapped. Then sealed with Reflect-a-cool (Agriemach again) and held with cable ties. The cable ties are protected with Reflect-a-cool because I suspect that the heat will harden them, and the whole thing once done looks quite neat. But its hellish fiddly and took all afternoon.
It gets really hot under there. I have two aluminium skid plates under the exhaust brackets. The front one was just touching the exhaust pipe, and on the Scottish tour, the point of contact melted the aluminium.
