Thanks OC. Phelios on Genesis/MD has indeed aged quite well. I received the cart back in the day for my birthday and for some reason did not like it, and also was terrible at it. Playing it for a bit last year I realized that it's quite excellent. Really rewards the charge/skill shots. To top it off, nice graphics and sound.
I've played the arcade original on MAME and it's a winner for sure. I've never seen the PCB, and am wondering if it ever made it out of Japan.