SDM mast clamp done, tried on two rigs today.
I feel it is actually better to have it on the mast, even the sail with the mast zip pocket did allowed to tilt the screen enough so that it can be seen while riding,
I am glad to have it back working and I can see it!
The only thing is that the clamp which I drawed at 50mm diameter was really loose on the Avanti mast, I will make a smaller one which can hopefully fit all SDM masts.
Also I sealed the antenna onto the watch frame since it was kind of looking flappy, some soft 5 min epoxy made the job quite well.