Yes, Sloan is part of the Chicago trial, on same principles. You can view here.
http://clinicaltrials.gov/show/NCT01325207
Twice a week at 40mg is equivalent to 80mg a week, so it is not such a low dose. My wife is still doing 150mg IT herceptin and 50mg IT steroid a week through lumbar puncture, with no side effects at all.
Wish you luck Evlin.
Mario