First start of 912is in RV-12

If you removed the valve covers and verified there’s no air under the lifters I’d say you’re ok.  However, if you used the starter to turn the oil pump and you saw oil pressure on the EMS, it means you had at least the Lane B ignition turned on.  See page 6 of the oil purge SI.  It specifically tells you to NOT use the starter for this purpose.  With the spark plugs disconnected during turning the engine with the ignition circuits on, you risk damaging the capacitor discharge modules since the voltage build up has no place to dissipate if the spark plugs are disconnected, so the capacitors can flash over.  Someone with more experience in this area can chime in regarding the potential for damage.