After mod to separate zones more and mark vias. This is primary result
![](https://cdn.hackaday.io/images/6313951608920648653.jpg)
Zone separation is too much, you cannot differentiate between separation and actual tracks : will reduce it.
Vias are marked with double circle: however as shown above double marking can result in touching etch-path. Will make a different type of mark.
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The double isolation works best with a pixel resolution of 60 (instead of the default 30). With a pxmm of 30, I got sliver of copper between some isolation paths and some tracks got thinned out too much.
However, I noticed that troubleshooting shorts on single isolation is much harder, since the isolation is so small that any debris could effectively short the two tracks. Double isolation does reduce shorting of tracks and soldering.
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