[DIYman (Doug)]

Thanks Ric and Ric

A friend of mine also suggested making the observatory look like a ordinary shed.

Another sugestion put to me was if I could fit heavy guage mesh used to reinforce concrete against the interior walls. This would slow down the breaking in process enough to discourage a would be thief.

Anyway, as pointed out, at the end of the day that's what insurance is for.

Cheers
Doug