Today I ran tank #3 thru my 5 port. I am using the break in on page 78 with no problems. Only thing I did is not run alum foil as it runs near perfect temps without it. After cooldown I took a peak at the plug and noticed some metal shavings on the bottom of it. When I first started break in I had no heat gun and quickly realized it is not possible to break this motor in without one. So after gettting a heat gun I had no problem cranking it. But before this I had to use a screwdriver to get the flywheel unstuck. Are these shavings from me forcing the piston thru the top of the sleeve? Before breakin I did a quick cleaning of the internals with nitro cleaner. Unless I missed some shavings? Should I pull apart the motor and clean it out again? I dont like the thoughts of loose metal shavings in my motor.