For the first trial I wasn't concerned about the final quality of the part (a simple plate) as I only wanted to be familiar with the process. However, I noticed I couldn't reach 'full' vacuum. Instead, the vacuum gauge was stuck at -29Hg (0.98+ bar). I closed all the leaks in the vacuum bag but I kept having that remaining pressure inside. In order to be sure of that, I connected the vacuum pump to the resin catch-pot only. The hose that usually comes from the resin catch-pot was clamped so the vacuum was only made inside the catch-pot. When I pulled vacuum from the pot, I obtained the same result.