Simon
Fran supplied an Ally L section bracket which bolts to the tub side, see pic below. Are you still waiting for your bits from Fran?
Guys, thanks for your comments, main reason for opening a build site here was that it will ensure that I continue to try and match the quality of some of the other builds (hopefully workin' so far:stunned

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Have to say the RCR is good to work on, the accuracy of the chassis alignment is truly outstanding, you really feel that your extra efforts are all the more worthwhile
Best
John