Re: ZF RBT vs. ZFQ
I'm not too surprised that Quaife don't want to make a new run of ZFQs to go into stock. There is a minimum run that is economic to do which is about 15 boxes as there is a cost in the setup time and obtaining castings etc etc.. Someone would have to find the money to create 15 boxes which is in the order of £90,000. Quaife are a business and in these difficult times do not want to have that amount of capital tied up in ZFQ boxes in stock. The GT40 enthusiasts who fronted up the money initially do not want to fund this either and who can blame them. We are all finding the financial conditions a bit hard. If someone wants to step in I am sure that they could come to a deal with Quaife.
As far as replacement parts is concerned I am aware of a UK GT40 owner having spares provided in the last few weeks due to damage caused by issues external to the box.