Was just looking at "flanged potting boxes" instead of Nescafe lids
(copyright G4JVF) ;-)
[SEARCH EBAY)
These look like a reasonable way of affixing a protective top to a
box, in which the GPS is underneath. Some epoxy resin or similar
around the edges to stop water getting in.
I have nit seen any box with an all round flange though which would
be even better.
Anyone seen them ?
73 de Andy
