Stingray Drag Knife

I have seen a few posts about drag knife attachments that are handmade. I came across the Stingray Vinyl Cutter made by Carbide 3D, it is meant to be chucked up in the router/spindle. I was wondering if anyone has tried to use this in the Longmill. To me it seems like a slick attachment for only $45, but I wanted to get some feedback from the community.

Finally got a tracking number for my machine should have it soon.

I would think it should work fine, just do not turn on the router/spindle.