The SDSM-DC 5.2 and 6.1 have been mentioned by the developers to downscale GCM data without the need for GCM predictors. However, I have note been able to find any documentation on how to go about it. the SDSM manual has only elaborated downscaling using earlier versions of SDSM where NCEP and GCM predictors have been provided. I have found it quite challenging and somehow impossible to complete a CMIP6 GCM output downscaling using the SDSM software. Anyone with an idea how to go about this?