I am new to devloping my own film and I have settled on using xtol and I am wondering if I should use a commercial fixer or make one (I work in a lab). Also I have access to virtually limitless supplies of Kodak Xray film fixer, could I use this? I have used Delta, Tmax, Neopan and APX in the past and I am trying the new J and C 400 film at present. I have read throught the forums and would appreciate some advice.