Well my Graft Concept Leverage lost it's button last week, and I noticed that there is a crack forming on a bottom corner.
I rarely remove it so it's a bit disappointing.
Funny thing is Graft have not yet responded to my email, yet they were initially very responsive on twitter that they would respond ASAP.
I'll give them another week and see if they respond...
Same here, bottom cracked and now in two pieces. Tried to email them twice and facebook message them and they have not responded in the last three weeks so I wouldn't count on them responding to you.