Hi and welcome to my listing for parts to fix broken mounts on Sinclair C5 indicators. This is a common problem and a good solution has been hard to find. This kit includes a new plastic insert and thumb twist screw. You will receive one insert and thumbscrew, enough for fixing one indicator.

Tools
Rotary tool with small cutting fitment
Superglue (optional)

Instructions

1) Use a rotary tool with the fine rod cutting attachment to cut out the original top clip.
2) Fit the insert. Using a craft knife cut away any additional material where necessary. Aim for a tight fit.
3) Fit the insert from the front and super glue in. The flange of the insert will cover the cutting marks. Alternatively fit the insert from the inside the indicator and you wont need to use any glue at all.
The insert does sit proud by approximately 1mm but good foam gaskets will compress to accommodate this. New foam gaskets are available in my other listings.
https://www.ebay.co.uk/itm/Sinclair-C5-Indicator-Foam-Set/233637000458