Hello primaevalThank you for your offer.
In return, if there is anythng I can do to help you out on LibreELEC (WebGrab+Plus and Mono addons), please let me know.
Perhaps basic option would be if primeaval configurator channels when writing to its own WebGrab++.config.xml channels are somehow passed as absloute list of channels (only the <channel /channel> strings) and included in LibreELEC WebGrab++.config.xml with no other changes being applied to LibreELEC WebGrab++.config.xml?
However I like idea that primeaval could provide an easy way in kodi for all the key LibreELEC WebGrab++.config.xml options to be modified using his WebGrab+Plus configurator (i.e. number of days <timespan> of EPG to extract) with ref WebGrab++.config.xml | WebGrab+Plus