I found tape on my side stays completely useless...

i NEVER look up there... it requires you to look away from the water, the sails, and into the sun on occasion..

I find tape on my bridal perfect... they are great for seeing apparent wind and shifts both up and downwind.

If you run a spinnaker with a mid pole snuffer, you may have to use the spinnaker bridal and not the forestay one as the snuffer changes the airflow and will provide false readings... At least it did on my rig