I don't know whether the rads are made at or for if from an outside source for Mulfab but Simon of Sifab fame used to work for Mulfab and I believe made the rads there. Now, when you see a Sifab rad the welding is superb and the top bracket mount is clearly stronger than the Mulfab option. If they are made in house why haven't they been revised as it seems there have been quite a few failures. Now a failure to a rad is water but a petrol tank is a different matter altogether
So, does anyone know more information on this subject re the welding queries. Sifab also made tanks too!