IBP_RAGGR configuration question

With Recommended Safety stock living at WKPRODLOC, when I do a Rolling aggregation of the 13wks - is it possible to define that I want it at 13 CalWeeks or a different time level? Obviously if I do a 13 periods at tech week level - the math produces a technically correct result, but it isn't functionally what they want.

Thoughts?

I can move my 13Wk Avg kf to CALWK but then I have to also adjust exchange rate, since the stock Exchange Rate KF lives at MTH - thus the dilemma