The sound that your pump does/doesn't make when testing your vacuum should be enough, especially after 24 hrs, so a gauge isn't always essential

Didn't spot this previously, but on such a small part using a resin break would be be ideal. In warmer temperatures especially, the resin can shoot across very quickly so slowing things down to allow for adequate wetting-out will help a lot. Leave the inlet side open until you're certain that all areas of the part are infused well.