Anon who shortened PAK Bayo here, just want to share some experience of making knee joint if anyone care and learn from my mistakes
After a lot of thinking I settled with using big Revo peg for a bend knee pose like pic related so at least the big ball joint cover the kneecap and settle with smaller size joint when the leg is at neutral like
>>5735878 to cover the sculpt. It's kind of cheating using two different pegs, but works good enough for static poses.
What I should've done is put the peg like how I draw it on pic related, ON AN ANGLE so a maximum bend from the big revo joint would yield you almost ~150 degree knee bend. Currently the big revo peg is at maximum bend, but since the peg hole is up front and straight that's the maximum range I got.
Unfortunately redrilling the peg on an angle would require some resculpting around the knee because it would expose the kneecap even more and that's way beyond what I signed up for initially when doing this. A lot of Revo figures like Raiden, Venom Snake etc bypass this sculpting issue with having some kind of kneecap to hide the joint.
Overall, I'm content to have Dante Bayo and Ryu finally on the same shelf, and the knee joint doesn't look as bad anyway. ~100 degree angle bend there is good enough for most Bayo poses except maybe one or two and the kneecap doesn't look as bad as the notorious vanilla PAK kneecap