We are collecting our Rapido 854f in 3 weeks time and will need a towbar fitted to take a bike carrier.Everyone recommends M Parkinson but I think he is busy and not responding but also a long way from Surrey.Best price so far elsewhere is £1750 which seems a lot.It needs chassis extensions (see picture) but it's only 800mm.Anyone done a DIY fitment on a non PVC? Seems pretty straightforward looking at the connection point and I'm pretty comfortable with general DIY.The extensions will have to drop down under the well of the garage floor but I guess this is a standard dimension?Thanks