Good to know, I will consider this, but after trying to file down the Innocase Surface case with no luck I am a little nervous

Figured a dremmel would do the trick to get the Surface case to work with the extended battery, but wasn't able to get it to work, and as the case was already rather thin in the back I was afraid to take too much off.
I have already gotten used to the fact that I have to push the bottom of the phone into the holster to make it work with this case, but if I decide to try to file the nubs, what did you use to file it down and did you just file the tops of the nubs (when holding the holster with the clip on top)? Thanks.