Hey You flow bench dudes

I was just screwing around the last 10 minutes at work and grabbed a shitty used valve and started grinding.
I started off with a 15° back cut which is nearly a perfect blend into the radius going up to the stem.
30°
45°
50°.
I cut those angles first then working in reverse I made a 50° seat, 40°, 30°,20° and 15°.
I'm sure you guys have experimented on this stuff but I was just wondering if it works and worth some power ?

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