Hello, I would like to build an extruder piece to substitute this https://it.aliexpress.com/item/33046425173.html?src=google&src=google&albch=shopping&acnt=742-864-1166&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&gclsrc=aw.ds&albagn=888888&ds_e_adid=&ds_e_matchtype=&ds_e_device=c&ds_e_network=x&ds_e_product_group_id=&ds_e_product_id=it33046425173&ds_e_product_merchant_id=109243011&ds_e_product_country=IT&ds_e_product_language=it&ds_e_product_channel=online&ds_e_product_store_id=&ds_url_v=2&albcp=22261776456&albag=&isSmbAutoCall=false&needSmbHouyi=false&gad_source=1&gad_campaignid=22268279741&gclid=CjwKCAjwntHPBhAaEiwA_Xp6RihhjummlxbnHH_bQXGmb2qVB2LhS7t6Mgo4IJqaVFjh9ERMfPEz6RoCZH0QAvD_BwE. I already have a drawing of what I want, it's a step file. Since I need it in Copper, for thermal reasons, and that would be expensive, I would to know how much would cost to have my drawing reviewed by your engineers to be absolutely sure it would work. Thank you in advance for your time