Hoping for some help here.  My bagging is basically 50/50 ie one success to one fail. I'm making the bags using both the standard EC bag and the stretchy stuff depending on the part. I try to take a lot of care in making the bag and I feel I'm fairly precise with it but when do the vac drop test the needle will often pop up when I release the clamp.  Try as I can in terms of checking the tape and the bag, it's usually the case in a failure that all the pressing and checking will not find a leak, but there is one there of course.  Is there a device which can find a leak? I have tried everything including smoke to try to find a leak to no avail.

Every time I've used the elastifilm it has burst on the silicone connectors  through the two unused slots meaning I have to keep chasing a leak with gum tape which slowly gets sucked inside aswell so chucked it in the bin.

I had the same problem on the silicone connectors with elastifilm. The film is soo stretchy that it can get sucked in the port holes and then burst.

A piece of peel ply over the connector stopped that happening.