Since update 7.8.6 in June 2022, we have disabled the option for the mechanic to create blueprints for free (you can only use Wild Card for that). On the other hand, we have added a free daily quest where you can claim upgrade, redraw and wild cards for watching an ad, and we have also removed the mechanic's cooldown, so you can ask her to create or upgrade your blueprints at any time!

Daily quest (gift) is available from Main Menu - Home.