Tips for sharpening a sujihiki on a wicked edge pro 4?

Hi all! Sorry if Wicked Edge (WE) is a no-no in this esteemed forum!

I am a hobbyist knife maker and just made my first Sujihiki. While the KE does a wicked (heh) job on my gyutos, pettys etc, I haven't done well on the sujihiki. I suspect it's because the knife has at least 2, maybe 3, differently curved areas. Any tips from the experts?