mx5 diff problems

[Talonmotorsport]

Did Westfield have to redesign the back end of their car to accommodate the cast ali cover? The whole point of this cover is that it allows the use of the mx5 diff to be fitted to a standard book spec chassis with out a major redesign.
As for the cooling effect of the fins on the the mazda casting they are there due to the limited amount of oil that it contains, the oil used in the diff does get warm during normal use and should be changed every 30,000 miles or so. If you compare the amount of oil that the fabricated cover holds to the Mazda item I'm hoping that the extra capacity should keep the temp down. Those that have any concerns about diff oil cooling then you could always duct passing air towards the diff the same as a race car has brake cooling ducting.