Add offset value to smooth scrolling links in sidebar navigation

Hi

I have a website with the logo and menu in sidebar left layout option – it’s a single page website.
Now i want to use smooth scrolling that’s build in in enfold and linked my menu links to the different color section anchor points on the page. Everything works fine.

I used the hack from comitzuu and added an offset value, so when i press the menu link, the color section has a nice little offset to the browser window frame.
https://kriesi.at/support/topic/adding-offset-value-to-smooth-scrolling-anchor-links/#post-434032

But now when i scroll the active menu class in the menu changes when the new color section hits the browser frame …
I’d like to apply the current class at the same offset value like described before.

Is this possible? And which changes in avia.js do i have to do?

Thanks you so much.