Hi I've been having problems with pine bowing after I've put it through my P/T. Example I took some wood from 21mm to 15mm, finished size will be 13mm yesterday left it over night but when I came back to it today it had bowed. So much so that it will be thinner than the required 13mm once its gone through the P/T again. The wood isn't the best quailty but it should be dry enough its been it the spare bedroom for about 2-3 months. Any ideas.