transformers gguf mergekit merge en base_model:DavidAU/MN-Instruct-2407-17.5B-BRAINSTORM-20x-FORM-8 base_model:quantized:DavidAU/MN-Instruct-2407-17.5B-BRAINSTORM-20x-FORM-8 endpoints_compatible region:us imatrix conversational