Hi Artie,
Negative - this is SIEVERS benchwork:
About | Sievers Benchwork
I tried, unsuccessfully over the course of several weeks, to make contact with the people at Mianne (for whom I know there is substantial positive support among many of the members here). I'm sure their (Mianne's) stuff is great, but I never heard back from them. I sent an email to Sievers instead and received a reply within the hour. It was a fun process to fit their modules to my trackplan. They helped in the design process; after going back and forth a couple of times we settled on a final plan. I sent them some money and they sent me a bunch of boxes.
I suffer (?) from a bit of obsessive/compulsive behavior and I know myself well enough to know that it would have taken me a year simply to look at EVERY board available and try to select the best stuff - not to mention all of the cutting, drilling, etc.. The wood Sievers sent is beautiful - clear, straight and smooth; pre-drilled and sent with all of the hardware necessary for assembly.
Anyway, I wish you the best of luck with your expansion project, whichever way you go.
Peace,
Sam