S Co wishes to sell widgets to B Co. B Co uses widgets in its manufacturing process and also sometimes, itself, sells widgets. S Co is concerned that it will have to make the sale to B Co on credit and that B Co’s financial position is not very strong. S Co has been advised that it can protect itself from B Co becoming insolvent before it pays for the widgets by means of a retention of title clause provided that it requires B to store the widgets it, S Co, supplies separately from those from other sources. Advise S Co as to the extent to which that advice is sound.