Data Access and Management APIs

Hello Planet-Community,I want to try Planet surface reflectance basemaps (https://developers.planet.com/docs/data/sr-basemaps/) to evaluate if it is suitable for my research project before purchasing wider access. In particular, I want to download a GeoTiff quad tile of a quarterly basemap mosaic via Python, as I have already implemented a processing tool chain which works for another satellite image provider. However, despite quite some effort, I could not yet fetch a single Planet basemap quad and are struggling with a bunch of problems:1) How to access surface reflectance basemaps (BGRN) via the browser on https://www.planet.com/basemaps or through the QGIS plugin? I followed the instructions given at https://developers.planet.com/docs/integrations/qgis/discover-basemaps/, but can view only visual (RGB) basemaps.2) How to get an overview of recent quarterly basemaps at zoom level 16? I queried the basemap overview as described in https://developers.planet.com/docs/basemaps/ with cur