F85 Flash to stock with 2015 I-step

Hello everyone,

My goal is to flash DME 1 and DME 2 back to stock due to Tuned software. Current Istep is F025-15_503, and has never been update whatsoever. I wish to keep it within same or similar range. Does anyone have access to the PSDZ Data FULL ? Also, will someone please confirm if I can update DME's alone if the only dependancies show BDC_GW as I plan to skip this.

Thanks