Nice layout! I dont own the JX and PG, but just comparing to the original PG200 I realized you made some adjustments. I lile the use of faders instead of knobs for the envelopes. Also you sorted the functions in the VCF and VCA section, such as moving the Mix knob to VCA. Looking at the re-arranged VCF section I can image this absolutely makes sense. If I may make some proposals: how about adding a red stripe at the top like the original? Also you could the "LFO" and "Envelope" label at the top of each according section. Some white vertical lines could probably make it even more easy to distinguish the sections.
But again: great work!