Anyone seen this? Trying to work out what it does differently? To the current laser web smoothie/grbl set up. Open source project so might be some collaboration to be had? https://www.kickstarter.com/projects/2118335444/gerbil-the-open-upgrade-for-your-k40-laser
https://www.kickstarter.com/projects/2118335444/gerbil-the-open-upgrade-for-your-k40-
Your link is incomplete, but I think you meant this one?
https://www.kickstarter.com/projects/2118335444/gerbil-the-open-upgrade-for-your-k40-laser
Paul de Groot is the owner https://plus.google.com/102073383537723054608/posts/211xTxDtDBi
Oh, and yes I did 
his engrave are done at 20mm/s. I’m pretty confident you can get the same results on your smoothie/Fabkit/laserweb at that speed so I’m curious to what he’s doing differently. The missing link is speed currently not much use for grayscale engraving if it takes over a day to fill the bed.
I am running one of the beta boards in one of my K40’s will be posting a review this weekend.n
The big difference is the use of an updated UNO processor with additional timers to allow 10bit engraving. The info is on the awesome.tech website.
So what bit engraving is smoothie?
Not sure on smoothie, but the gerbil setup on his kickstarter is only $65 USD, which is a low cost entry point for a $300 laser like the K40. Would I use it on a bigger or more expensive laser? No, I would stick with a smoothie based system. Especially one like yours, everything about your machines is very high quality, and an extra $70 - $100 is not a big deal.
Well that’s if you compare it to the smoothie 5xc which has a few more features and drivers. A 3 axis board or one without any drivers is a similar price or cheaper l. I think the c3d is a similar price and a drop in replacement. I have backed him as more input into the open source community can’t be a bad thing
C3D is double the price. But thank you for backing him, as you said, more input in the open source community is always a good thing. Shipping costs for the C3D are also higher to Europe and Asia, Paul will be fullfilling orders both from North America and Australia, so shipping should be kept quite low. For me, I just have fun playing with different controllers, I spend more time messing with the electronics than I do actually using the laser for projects 
The pwm resolution is not the real problem. You can’t even differenciate 256 levels of gray on wood, so what advantage should 16bit pwm bring? The problem is the pwm frequency that has to match the LPS and laser response. This is the real limitation of Grbl on ATmega328P, which only has big stepps of pwm frequency. Because of the additional 16bit counters of his board, the pwm frequency can be adjusted much finer.
Smoothieware already has 10bit pwm resolution and the pwm frequency can be adjusted very fine, so I don’t expect any difference in grayscale quality. The same is true for grbl-LPC.
@funinthefalls To be exact with the price: The kickstarter board whith controller and 2 stepper drivers is USD65. The Cohesion3d Mini with 4 stepper drivers is USD99.99. So only 50% more for the option to connect Z and A axes and have more computational power.
Thanks for the clarification @cprezzi