kavinci engine mounts

Location
New Zealand
They are a cool design but what are the reviews like?. Engine vibration etc. Very easy to line up by the look of them but I haven't seen anyone using them?
 
Location
New Zealand
Thanks feedback is what I want
been using OEM sit down mounts with 2mm machined off the bottom to allow shimming. No vibration and last. I do use keepers and motor mates just incase thought.
 
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