hi guys, i've bought a resin infusion starter kit, i followed the video tutorial but i'm failing to obtain the desired vacuum level. I can clearly hear a leak from the vents, i've tried several times to do the bagging from scartch, to use more gum tape around the tube, to put gut tape both inside and outside the bag, but still i've a huge leak, the gauge doesn't go under -0.5 bar. how can i improve vent sealing?