The CS-65 stand attaches to each side of the Casio Privia DPs...but you need to detach first
the two side-panel plastic frames from each side of the Privia before you can actually screw the wooden CS-65 stand. Essentially, each side of the PRIVIA inserts into a "shaped-hole" on both wooden stands (left and right) that matches the contours and shape of the side panel of the Privias.
Do be careful in removing the plastic side panel frames since these are plastic frames and may dent, crack or break if you apply more force in trying to "tug" it out. But don't worry, these side panel plastic frames are really removable and is meant to be removed if you use their CS-65 stand. Well at least, that's how it is in my PX-320. But since the CS-65 wooden stand is shared by several models (i.e. PX-200, PX-320, PX-120, PX-800 etc.), I'm assuming that the big side panel holes on the wooden stand would only fit properly once you've removed the plastic frames from each side of the PX Privia line.
If you can somehow manage to "craft" or design a customised wooden stand for it, I'd suggest :
1) one that fits snuggly both ends of the PX-200. And yes, if you want it to be sturdy enough or if you don't want it to shake at all, you'd need to drill holes and make one that EXACTLY match the contours/shape OR the entire side panels of the PX-200 (after removing the plastic frames I mentioned above).
> essentially you'd be making one big hole on whatever wood you'd be getting for each side of the Privia so in effect you're inserting each side of the PX-200 into each big hole on the left and right wooden stands.
2) getting a wood that closely matches the color of the PX-200...but this is just for "aesthetic purposes" of course.
3) having a great deal of patience in creating one
If you want to get an idea of how the CS-65 attaches to the Privia, here is Casio's official CS-65 PDF file (you'd need an Adobe Acrobat Reader): Casio ASSEMBLY instruction guide for CS-65 stand
Good luck and hope this helps.