I instantly lost that rubber cap on both my xt1 and xt2 but only my xt2 has this problem. I've never heard of this issue with xt1(maybe im wrong and its a thing). I also used my xt1 heavily. Like lots of brazing lots of beatings, all weekend raves, festivals, world travel etc and really no problems. vert grip on and off and on again. I've been much more careful with my xt2 as im using it for client work mainly and this vertical grip issue is a big problems. Let me know if anyone has updates.