Cleaning, adjusting, and shimming lenses the way you do markedly enhances their performance, if the user knows something of how they work best. Quality of the Russian lenses is highly variable. Not just anyone can look under the hood.
The ncie thing about doing a CLA- if the picture is out of focus, you only have yourself to blame. Writing your own Device Drivers that take over the Interrupt Vector Table directly- if the system crashes, you only have yourself to blame. If the computer catches on fire because the power supplies cannot handle the load, well- what are the odds of that happening again.
A Samsung Tab A 9.7 with S pen to replace my Galaxy Note 8. Love Tne Note, but have wanted a bit more screen real estate without, however, going huge. I will never get a tablet without a pen and good handwriting.
Love the new one.