I did this too (with a Goldtouch instead of the Freestyle), and it worked... for a couple years. Then I get RSI so severe that it took me off work for 12 months

I did this too (with a Goldtouch instead of the Freestyle), and it worked... for a couple years. Then I get RSI so severe that it took me off work for 12 months. In my case, I think it was the bad posture, smartphone use, and laptop use in bed which continued to damage the tendons, despite the ergonomic setup I used during the day at work.