Jt excellerator as a mask? Im not sure thats what the good ppl at JT intended it to be used for no! but i know what mean! The nVader is ok! I personally went with the spectra instead... not much more but a much nicer mask!
I used the nvader to start with and although they are good goggles I now use flex 7`s which are great. They don`t steam up and they are very comfortable to wear. Plus with a tinted lens look sweet.
Hope this helps.