I've found a solution to the mask clipping problem found when replacing the revan model for the BOS:SR with Sithspecter's. What you need to do is open up the KOTOR tool open your override folder and find the ds1_revan_robe.uti (or something similar to that, cannot remember the exact name). Now go to the properties tab and make a new value. Scroll all the way down to disguise then select Unique_Darth_Revan. And there you go. Mask clipping issues solved.
~ I know that you believe you understand what you think I said, but I'm not sure you realize that what you heard is not what I meant.