holes with variable pitches on x- axis

Hi.

Is this possible. I have a plate with holes with variable pitches on the X- axis. The hole X- centers on Y axis are the same (200mm).

In our drilling software i can input variable pitches on the X-axis thus 300;2@75;450;2@90

So working from a set end it will show holes at correct x distance.

In SolidWorks I am having to use two groups to get the same result.

!st group is 300 then 2 at 75mm

2nd group is 900 then 2 at 90.

Is it possible to do these variable pitches all in one go. (assuming the y axis is always the same).

See attatched sketch for an example

Thanks

Mark (SolidWorks 2010)

SolidworksParts And Features