He has no L27 or L36 injectors in the pool at this time, so definitely send at LEAST 12 injectors to get him started.
He has either 12 or 18 S1 L67 injectors already cleaned and has known values for them.
He has only 4 extra S2 L67 in the same condition.
If he flowchecks your 6, and one is an outlyer, he'll toss it into the pool, and select a better match from the pool.
A reminder for those that don't know......Chris Miller owns and operates FIE (Fuel Injection Enterprises). He'* a friend and co-worker of mine. He also has a pretty cool hobby: