Graph showing sieve results, and upper and lower limits

Hi, first time writing here. Fairly new to gINT as well.

I'm trying to streamline the way our company creates borehole logs, and sieve plots.

BH logs I'm doing ok with, so far anyway, but am having trouble with the sieve plot / graph.

What I was trying to do was add two extra fields under 'Lab Testing', 'Sieve', 'SV Readings', so that I could enter the upper and lower limits at the same time as entering the sieve results.

At present to create the sieve plot with three plotted lines, I was creating three separate 'PointID's, and doing it that way. But when I started looking at XY Graph Report's properties, I noticed that I says under 'Dependent Data', that you could have up to six Data Expressions. So I thought, I could just add a couple of new fields under 'SV Readings' table, add them into Data Expression 2, and it would plot another curve along my sieve results.

The expression would look something like this: <<Union(<<SV READINGS.Upper limits>>,<<HYD READINGS.Percent_Finer>>)>>

Sorry if this is long winded and confusing - welcome to my gINT'ing world :-)

Any help or suggestions would be great.

Thanks

Happy logging.