I have never heared of an adjustable precleaner for the STS, but it makes sence. We fought the excessive returns and dirty samples all summer long, too last year.
I know that loewen has an adjustable Pre-cleaner and yes the STS does have a problem with excessive returns which can manufest itself into all sorts of associated problems - I'm really after info from people who have fitted and used the adjustable pre-cleaner. Thanks for your contributions anyway.
WE HAVE 9750 STS AND HAD DIRTY CANOlA AND FlAX SAMPlE . FOUND THIS WINTER ABOUT lOWEN ADJUSTABlE PREClEANER AND THAT IT HElPED, BUT AlSO NEED TO TAPE FINGERS OFF ClOSED ON TOP OF PREEClEANER.