Illustrator :: Using Scatter Brush To Draw Multiple Lines - Spacing Option Follows Size Of Base Object

1. original

2. doubled horizontal size of the line

I'm using scatter brush to draw multiple lines with random size and angle(image 1.), and trying to increase only the horizontal size(image 2.), keeping the interval the same. But when I do, the interval is also increased since 'Spacing' option follows the size of the base object.  I could adjust and decrease the spacing value, but the problem is, spacing option cannot go below 1%. So if want to increase the line size and maintain the interval, there's no way to do it. expending then scaling could work, but that's not what I want.