I bought this track system to fit a customers cupboard doors 18mm ply about 10kgs in weight which the system is meant to handle, it was absolutely hopeless, the doors did'nt slide at all. The track set was flimsy and two separate pieces which had to be fixed independantly from each other, it might work for 6mm very small doors, but certainly nothing over 3kgs. It was certainly not worth £50, I threw it in the bin, bought and fitted a Henderson roller track set for £50 which worked perfectly.
Top guides worked well.guid to keep bottom of doors inline not the best design .managed to get it working fine but adapted bottom guide
