Summilux-M 28mm f/1.4 ASPH Delays

The Leica Summilux-M 28mm f/1.4 ASPH was rumored for over two years - ever since the 6-bit code for it was discovered in an M9 firmware update in July 2012. The lens finally made its appearance in September 2014 at Photokina as part of the Leica M "Edition 100" set and only in a stainless steel finish. Typically, it would become generally available in the usual black anodized aluminum or silver chrome plated brass finishes... But it hasn't. So where is it? From what we understand, Leica is having issues of scale with this lens, namely a similar phenomenon as the trouble with the APO-Summicron-M 50mm f/2 ASPH lens. There also seem to be some design hurdles with machining new barrels out of something other than stainless steel - such as the aluminum and brass usually used. It's coming, but it might take a bit longer.