Just in case anyone is thinking about this drop. I personally had this one because I had a Castor. Anyways, you'd think that their own pad would track super well, but I only ever got it up to 7/10 from their own software rating. Also, as this isn't stitched around the edges, it can fray. I used mine for about 2 months before it started to fray towards the bottom. I eventually packaged them together and sold them on ebay. Just letting y'all know before you get it.