hi i have just purchased a 1996 300tdi that has had alot of work done on it and not to the best standard. the tub has been replaced for a td5 tub and im havin the filler neck problem. can anybody tell me what the o.d of the 300tdi fuel tank inlet is and also the o.d of the td5 filler neck so i can go buy a load of silicone hose and couplers. any help much appreciated. cheers