Vsini Adding

I have some measurements of vsini which I could use to get a gyrochronological age. In order to test if this was an appropriate method, I did this and plotted age (period) vs age (rhk) to see how good an agreement I could get for both period measurements and vsini measurements. Here's what I found:

This says to me that vsini measurements will NOT work to get a gyrochronological age. Looking back at my original gyrochronology ages, I find that I used 16 sources of Prot that were inferred form vsini. So that brings my trustworthy gyrochronology ages down to 34 stars. :(