Op-Amp PCB Split Redesign

I already have a complete, proven op-amp schematic with a matching single-board layout. For my next round of experiments I want to separate that design into four or more individual boards so I can evaluate each functional block in isolation, swap sections, and generally play with the architecture without respinning the entire assembly every time.

Here’s what I need you to do:

• Study the existing KiCad files (schematic, PCB, net-classes, constraints).
• Propose a clean partition that keeps signal paths short, power rails quiet, and grounding consistent once the sections are cabled together. Include snap-on connectors to cleanly snap on power or additional stages.
• Redraw the schematics only where necessary, then create new board outlines, placement, and routing for each daughterboard.
• Deliver Gerbers, drill files, updated schematics, and a consolidated BOM ready for fabrication.

Acceptance criteria: the split boards must plug together with snap-on connectors and reproduce the original performance within spec; all op-amp feedback loops must remain stable; and each board’s silkscreen must clearly label inputs, outputs, and supply pins.

If you usually work in Altium or EasyEDA that’s fine—just export back to KiCad so I can maintain the project. Looking forward to seeing how you’d carve this design up.

Input stage to have options for RCA or screw terminals. Same for output.