Also, 1 top level cell hierarchy ?!?!? Tinytapeout will fail that for sure and by a very wide margin ...

Hi @tnt There should only be one top level cell by the time a project gets through precheck. Sometimes for whatever reason that isn't true. Having two toplevel cells causes a couple of the DRC checks to give false positives and Skywater to kick the chip back, causing delay in closing tapeout.

Yeah, @Anton Maurovic (efabless support) explained, I had misunderstood the rule 😅