Hello, for the FVG (Friuli Venezia Giulia) there are orthophoto, Lidar and other services that are much more precise and reliable than Bing Maps Aerial and ESRI World. For orthophotos in iD, the personalized string is this: http://irdat-ortofoto.regione.fvg.it/geoserver/ows?FORMAT=image/png&TRANSPARENT=TRUE&VERSION=1.3.0&SERVICE=WMS&REQUEST=GetMap&LAYERS=ortofoto:trueorto_FVG_1720&STYLES=&CRS={proj}&WIDTH={width}&HEIGHT={height}&BBOX={bbox}
In this specific case, your changes have slightly worsened the quality of the mapping. If you need additional information or help, I am at your disposal. Good mapping, Michele.