Well, just received my Micro Four Thirds Mount from Krontech, and am not happy with it, will return it. Flatness and Alignment Error on that Adapter they sent me are just not acceptable in my Opinion. Metabones seems to use a Tolerance of 0,01mm maximum Error for Flatness and Alignment across their Whole Adapter. Measured by myself for above Guide, no idea what their actual Specifications are, but both Speedboosters i own stay well Within 0,01mm Error, so i assume thats what their Specification is. An Gauge Block will btw. wring just as well to the Mounting Faces from the Metabones Speedbooster, as shown in above Video with my Spacer Plate, which i ground to the Same Specifications as i assume they use.
Now the Krontech MFT-Mount (can only speak for that Single unit i got sent, sample size: 1; no further Reference, i hope this one is for some reason just wildly out of Specification and all the Other ones are way better or something, but might be just as bad as this on the other ones) is out of Alignment by 0,151mm from a very quick check, which is just way too much for me, and certainly more than what i will accept for almost 400 USD for us Germans (including taxes and stuff, also Shipping).
Mounting Holes are also for some Reason too tight to fit the Standard M4 knurled Thumb-Screws i usually use for all my Adapter Plates on there (i assume the Included Screws work fine, but i need an Tool-Less Setup for the Mount Plates!), so i didnt even get to mount it to the Camera.
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Will send that Back unused, and just finish my own one, while i am At it, i might as well just finish this guide and make all Dimensions for my MFT-Adapter Public, once i am done, so People can build an Adapter with somewhat tighter Tolerances than this Krontech one i got here. I guess the Krontech one is still an MFT-Adapter if you just need one, but at the Moment i just cant recommend it, if you need Precision. Hope they get their stuff together and do their Homework regards Flatness (the Thing literally rocks back and fourth on a Flat surface...) and Alignment, or at least adjust the Price accordingly if they dont, cause the current Quality of product does just not match the Asking Price.