I will test this when I get home today! You guys are awesome.
Ok @Arion_McCartney please test @cprezzi version of firmware. You can get this on his github at the release tab. I test my and his version and claudio’s are better 
I test moving and laser, works. Just the limit switches are not working now. We work on it.
Not sure if releases is up to date. I have the latest he emailed me yesterday. Will put up a link shortly.
I got the last firmware 15min ago from his github and it works
Oh wonderful. I am still on yesterday’s news then
Today I was working on a 4 axis version 
Even better!
Will publish as a separate branch.
@raykholo gonna firm one of yours asap!
@Frank_Herrmann @cprezzi Seems to be working. I can get the laser to fire. Had to reverse direction on both x and y axis. I cannot get Y axis to home, only X for some reason. Maybe a config that I am missing… I will do more testing here in a bit, but I ran some gcode on a vector engrave and it worked. Had to set the zero point manually as the homing Y axis is not working as I said. Is the Z axis homing disabled in the config.h? Not sure if that affects anything. I enabled homing and reversed direction for both x and y axis in configuration settings as well. THANK YOU! Also, I added G10 L2 P1 X0 Y-200 to the homing sequence in the LW settings.
@Arion_McCartney same experiences here. Y homing not possible. But it works close to perfect. I’lll check the code changes from @cprezzi tomorrow.
After, x homing works.
@Frank_Herrmann make sure Y_LIMIT_BIT matches the pin you plugged your Y home switch into.
@raykholo can u check the wiring of y-axis limit switch and tell us which port u use at c3d mini?
Oh. On Mini It is the Y MAX switch but it is plugged into the Y Min port. Same pin as stock smoothieboard.
First test with raster image engraving with GRBL on C3D. Image on left is on MDF with latest build of GRBL for C3D (300mm/s NO STUTTERING and 23 minutes to engrave). Image on right is on Poplar wood with same image running Smoothie on C3D (35mm/s STUTTERING and over 1hr 15min to engrave!). VERY happy with this first test! Obviously, it would be beneficial to redo the test with both engravings on the same wood, but thought I’d share some test results from you dev’s awesome work!
+Peter van der Walt you are very right!
That looks awesome! And the speed is reasonably fast to. How well is the grey scaling? We could barely get it on Todd’s machine and we are hoping it’s the power supply and not the code.
@Brett_Fleming @Frank_Herrmann Paypal link? I cannot find
@Brett_Fleming I will do a grayscale test here in a bit and post results