Hmm, in principle yes - the height limit of the QRS will be the same as the original seat molding -
but in practice surely not conveniently, I’m sorry to say.
In few words:
The QRS system has two ranges, the first from 145 to 175 cm and the second from 175 to 193 cm.
The ranges can pe preselected by the position of the seat pin (upper or lower seat pin hole).
Within each range, the height can be adjusted easily.
But to change the range you have to unmount the saddle and the QRS system, change the seatpin’s postion, and then to remount the whole thing again!
My girlfriend is 172 cm, I’m 189 cm.
If we ride with 16" wheels, the lowest QRS height (with upper seat pin hole) is manageable for Mrs. BSA.
Equipped with 18" wheels is the the lowest QRS position too high for her (just 1" makes the difference).