Sealing ROV1, a set on Flickr.After initial tests of the ROV1 it became clear that it was really leaking.
I has used cheap foam gaskets for attaching the windows and no seal at all around the bushings for the motor and surface cables.
Christian of Illutron gave me some soft 3mm. vinyl sheet. This stuff seem ideal except it's really nasty to laser cut.
Adding an extra O-ring seal ensures that all packing surfaces are facory finished.
After testing with a vacuum pump I am now much more confident that this little ROV will stay dry inside.