one more question, what is the problem with some parts that can’t connect correctly or precisely enough to the ports?
when i put it just a bit hight it turns blue/green:
Is this due to incorrect port placements in the svg? or something else?
PS i could swear someone posted the same question about a part not connecting correctly to the ports, but cant see that anymore here 
edit: found it VTL 5C1 or the like vactrol - #4 by poetaster