I am the guy working on the made in Canada M203.
Yes we are still working on it. No we have not made much progess.
We have completed a prototype free-float mount, found the bugs, found some outright errors, and have redesigned. We have not cut steel (aluminum) on the Mod 2 mount. The M203 is a proven design, we are not concerned w/ the prototyping of it, just our new mount system.
Again we still have barrels as an issue, and I have just recently explored a new option and waiting for a reply due in aprilish.
And y'all have to remember, I am doing this project while working some wicked long hours @ work, renovating the house (bathroom now), and a 9 month old.
We are hoping to have this wrapped up this year, but we are doing this right, not half-assed, so smoothbore barrels will only be a LAST resort, and If that is the last resort, this project might get canned.
Patience is a virtue I have been told, and there is no one more anxious to get the off the ground than me. (well maybe KevinB

)
Any way I will be setting up a poll in the next couple weeks, as to which rail systems you guys would like to see this thing adapted to for FF mounting.
Mike