I am building a kitchen which has some very wide (1200mm) pan drawers in the design,I am a bit concerned about the tendency of the drawer to "rack" (I believe thats the term) owing to the width.I can locate various runners which will easily cope with the loading,and have soft close etc,and there is a rack and pinion system listed in hafele u.s. but not available here.Anyone out there undertaken antyhing similar?