Since its on the underside it will take alot of beating, thats why i was wondering about using EF80
If you look at this picture

The side is in fact rubber on the original item, so it will bend upwards if you hit the road with it.
Now i have tried all evening to figure out one tiny leak.
I had several leaks which i all found by putting my ear into the mould and listen.
But there is at least one more leak which i am unable to find, any suggestions?
This is the setup

Gauge stops here: (closing the pump causes the vacuum to drop)

I actually found one leak that was through the whole mould ?!?

How do i prevent this in the future? more careful when applying the tooling resin?