So after only about 11K miles, my right Sora Shifter stopped. It's ironic because as I was riding, I was marveled at how flawlessly it had been working. Basically, the rachet mechanism stopped engaging all together. Both the lever and the thumb shifter move just fine but nothing is engaged. So my question to the expert: Is there anyway to salvage the shifter or is this the end of the road for it?