Hi Matt,
sounds like you are really cracking on with your chassis build
You,ve had some very sound advice from Talonmotorsport & Ronnie
As suggested earlier in the week, bear in mind the "Footwell space" when deciding on the postion of your transmission tunnel, as you are fitting the MX5 drivetrain you may well be able to use the "Type 9" dimensions for the tranny tunnel & not lose any footwell space,
look forward to hearing/seeing the final position you decide upon for the tunnel.
cheers
andy