Of the rail design whose cross-section is like a T with an angled top and a side projection like a K, I have one at 3 metres, one at 134 cm, one at 142 cm, one at 90 cm and one at 80.5 cm.
Of the other design, with two T shaped grooves, I have one at 125.5 cm, one at 111.5 cm, one at 101.5 cm and one at 91.5 cm.
Also fastenings as you see in the pictures.