I did this with my Claymore II.  It's a fairly straight  forward process that takes about 30 minutes and will set you back $10.   It's just annoying though that something this expensive needs to be serviced in less than 2 years. 

Identifier wrote:Just wanted to reply here to say I recently experienced exactly the same thing. At first my 'o' key stopped working intermittently,f.I had the same issue where the "o" stopped working, followed what you did and removed the battery a...