More info on performance improvements.
11 Lilia sequences opened and saved on my desktop (Windows 7, i7 8x3.6g processor with 16g memory)
Column O is average of versions 46,47,48.
Other versions compared
BLUE: save times are < AVG*0.75
GREEN: Save times are AVG*0.75 to AVG*1.50
RED: Save times are >= AVG*1.50
Dan and Keith worked to get these improvements