i found if i have a gauze pad with baby oil, or sewing machine oil on it this can be used to wipe the *gunk* from the needle that builds up while sewing...it is hard to stitch through but lots easier with the machine than with a hand needle. it also stays pretty stiff in the finished project, but it's not the end of the world. the t-s will really hold up now with the heavy interfacing :)
it makes it a little more difficult to complete, but is still totally do-able.