"I wouldn't go for UDI in any event.....I don't have a death wish. The UK govt would immediately send in the troops and the tanks, "to protect our defence installations"

Ridiculous. If an SNP Government was daft enough to make a unilateral declaration of independence they would run out of money and starve within months if not weeks. The flight of capital, businesses, jobs and expertise would be a stampede, the likes of which has never been seen. The SNP after having eight years to prepare for their referendum couldn't even get their act together to answer even the most basic questions related to the running an independent country, they still to this day have not addressed any of those questions, they were clueless then and they are clueless now - oil price then 110 US$ per barrel now just over half that, and they are still living in cloud cuckoo land.

"The UK needs us much more than we need them"

Don't really think so Akenaton.

So Akenaton what is your currency after declaring UDI?
Scottish trade within the rest of the UK (predominantly with England) amounts to 80% of your trade. Everything England gets from Scotland can be sourced elsewhere so who is UDI-Scotland going to trade with?