IAME USA has produced updated technical bulletin for specifications for the KA100 engine.  Effective immediately, the below updates are associated with that bulletin, with respect the the WKA Tech Manual

625.10  IGNITION

Re-name, article 626.10 IGNITION

626.10  IGNITION

ADD:  Must have stock washer, indexing washer or CHT lead in place.  Maximum Length 18.5mm including washer lead.