Adjust Gap Width on Column Chart

[mr_g_99]

I have a 100% Stacked Column Chart with 10 Columns, I've been able to adjust the column gap width with

ActiveChart.ChartGroups(1).GapWidth = 50

but this changes the gap between all of the columns.

I'd like to present the chart as 5 groups of two columns, is there a way to set different gap sizes for each column?
Thanks!!