@User: "When I get it done". . . so you can poke me for updates. Right now, Mohamed Shalan is working on the wishbone bus interface definition, and we have a small project to try to simulate the pads with ngspice (we simulated with the verilog but our trust in that goes only so far). Also there still remain some questions about the RDL layer, as it appears that SkyWater uses a 3rd party service for the bump bonds, and the specs vary a bit depending on the vendor, and that potentially impacts the size of the design and the total number of bumps.