Yes I have...I'm there all the time.
No offense, but you go purchase a $15-17K machine and then charge $5 per injector!!! Then lets see what ya say!! It only cost McDonalds .11 to make a big mac too, How DARE they charge $2.50 for it !! (after payroll, packaging, rent, etc.) lol
Jeff's not trying to make money with this deal...He's doing it to better his customer satisfaction and reliability!! Preventitive maint. so to speak...Catch stuff before folks melt down there engines!!
I'd call that Cheap insurance by someone who Cares and wants to see customers Happy and this sport Grow!!
Care to refraise now?