Rocker cover

Ok so youre saying, and I know Im repeating myself, that the flatspot and hard start came directly after the valve adjustment.In that case I would back off every exhaust valve exactly 1/4 turn and try it again. If no change I would do the same on the intakes. If still no change I would put them all back the 1/4 turn. I would quietly put my tools down and walk away.lol
BTW, you might want to check if the accelerator pump linkage fell apart while you werent looking. double lol