I call that unnecessary pain and suffering. :rofl
To me it's like this; you have a lift and jackstands and you need to replace your clutch. You decide to use the jackstands for the added "experience", see where I'm coming from?
lol :wub
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The time savings is marginal, at best. How long does it take to really take apart the VANOS? Maybe 10 minutes? A shop would have to take a few hours longer to do the Beisan kit for you to have a cost savings in getting the Dr. VANOS unit instead. I can tell you, it doesn't take long at all to install the anti-rattle bearings.
But, it is the easier solution, so it's your wallet and your choice. :)
Really tough to make a decision now....not even knowing if they put the proper software in it....
Software? The VANOS seals and bearings are mechanical.