Decimal places shown in a repeat region

WF 4.0

What I want to do:

Show a family table driven dimension in a tabulated table on a drawing. Column 1 is MM, column 2 is Inch.

In Part:

Units are MM.

d1 is in the family table

properties for d1 is set to 3 decimal places

parameter: DIA_INCH

relation: dia_inch = d1/ 25.4

In Dwg:

table w/ two columns

individual repeate regions for each columns

filter set for column 1: &fam.inst.param.name == d1

filter set for column 2: &fam.inst.param.name == DIA_INCH

Problem:

I need to have the MM column at 3 deci places (controled by the properties for the d1 dimension), but how do i get the Inch column to display at 4 deci.

I know about the &param_name[.x], this only works in a note.

Thanks for the help