Can a Parameter in a BOM Table (Repeat Region) call another Parameter from the Assembly Model?

OK, I will try to explain what I am endeavoring to do here.

I have bulk item that is measured in LB's, and another that is measured in Gallons.

I have created a family tabled assembly, where each instance uses a differing amounts of these bulk items

I then have a BOM Table in my drawing with a column for Unit of Measure, and another for the amounts used for each assembly item.

The challenge here is to be able to get the BOM table to show the different amounts of these bulk items, if each of the specific drawings for each instance of the family tabled assembly.

I am currently doing this as follows, and it works very well, but is rather cumbersome:

Note: This relation does control both BOM Items;

The report statement for the column is:

&rpt.rel.QUANTITY

Where "Quantity" is user defined, and is automatically created as a Repeat Region Parameter, when entered as the user defined string.

Then I entered the following Repeat Region Relation, which has to be entered with the specific quantity for weigh and volume of the two items in each assembly drawing.

IF pnreport == "PA0002"

QUANTITY = "0.00025"

ELSE

IF pnreport == "PE0003"

QUANTITY = "0.00125"

ELSE

QUANTITY= rpt_qty

ENDIF

ENDIF

What I would like to do is to add Parameters for the two items in my generic assembly model, and then family table them, which is a much simpler method of controlling these numbers.

I would then like to have the Repeat Region Relation call those parameters from the model, and display the appropriate Wight and Volume for the specific assembly in the BOM Table in its specific Drawing.

I have tried creating the parameter in both the assembly model, and in the repeat region, but that does not get it done.

I guess the question is this: Can a parameter in a Relation in a BOM Table (Repeat Region) call another parameter from the Model or not?