@User @User, For the resistance issue, xschem does not make any assumption on the sheet value, what it does is produce the correct netlist line for it using the user supplied parameters (W, L, mult) and let ngspice simulate it. I have not touched the resistor model file parameters. For a xhigh poly resistor netlist line looks like:

XR10 M net10 B sky130_fd_pr__res_xhigh_po_0p35 W=0.35 L=0.5 mult=1 m=1

I hope the above format is correct, if not let me know.