Of all the data files on the Crash Boat I have not ever seen any details/ drwgs for the vehicle specifically used to transport the Crash Boat types ( Ie the British Power Boat co ) had transporters for their craft. Anyway I enclose a picture of the OFFICIAL English designed TRANSPORTER vehicle for the Crash Boat and a photo of verification as modelled by Peter Dimberline. I have kept my model stock standard, still have the original plastic red Graupener prop of old I think it is a 30 with a nick or two. Soft copper brake tubing pipe (1/8 I/d) is only around the head and one of the inline exhaust resonators has a water tube outer casing to cool the exhaust piping and inner tube gas temperature which takes out the energy/heat of the exhaust gas and dramatically reduces noise. Hope my hints help .All the best Lyle.