I also purchased a power sharpener maybe 40+ years ago. I used it a few times and found that it likes to grind away my nice chisels much smaller than a good sharpening stone or diamond plate. The best thing to get is a good honing guide if you need something to keep a consistent angle on your chisels until you learn how to sharpen your chisels. The old adage of K.I.S.S. is still true today.
Just after I stopped using that power sharpener I bought a Lee Valley Veritas Mk. II honing guide and never looked back. It is a wonderful jig. It's price now is a bit expensive but well worth it in my opinion. For gouges you will have to learn how to sharpen them by hand. Not hard but it does have a learning curve to it.
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Veritas Mk.II Standard Honing Guide - Lee Valley Tools>