I could be wrong but ....

[TalonMotorFabrication]

If the drop off in sales are any thing to go by I'd say there seem to be a definite slowing of new Sierra based cars being built. I know that Sierra donors are few and far between on ebay, gumtree and even in the scrap yards so are people that are just starting to build 'book' cars by buying their running gear from just parts? Has the Sierra Roadster had it's day and now moved on to using the MX5,
I think it may be time to publish the drawings for the extra tubes,mounting lugs and diff nose mount needed to fit the MX5 diff in to the 'book' rear suspension cage.