Rail-To-Column Mounting Kit Designed to fit BT8390 Mounting Rails to BT8385 Vertical Columns, the BT8385-RTC Mounting Plate can be fitted easily to existing Mode-AL set-ups or used in conjunction with B-Tech’s component ranges to create your own bespoke mounting solution. Use BT8381-JPS alongside a BT8390 Mounting Rail to fit a BT7884 Flip-Down Storage Tray to Mode-AL displays.