As long as IK/KH/Q/W/T16/20L (Original 1.1mm) once is gapped to 0.8mm => more power and performance can be expected (immediate effect after installed).
Measurement of plug gapping to 0.8mm will be shown to buyer during order collection.
To those who made it for this short trip, here is some pics for you all to remember. Sorry the quality of the pics is not so good, will bring a better camera next time.