Need help with General Motors' future platform strategy? We have you covered with this handy, pocket, go-to guide that was a smash hit with just-auto readers this week. Speaking of platforms, Volvo this week revealed a couple of concept cars that hint at what it is doing with its version of the new CMA architecture being developed jointly with Chinese parent Geely. And we got the inside view about how that cooperation is working out from the chief of R&D.