Well, here is what im thinking. BigA said to use 1" pins for bi's and switch the shots up and also use diff size pins. Like one day 3/4" then one day 1/2" pin an then 1" So the IGF shots will only be with 1/2" slin pins, so the days im using 1/2" sythol shots, i'll avoid the IGF there, but the 1" and 3/4" days, the oil will be deeper so im presuming the IGF will be fine.