Stravey Boris,
thanks very much for setting link to your website here, I have yesterday discovered. I could made only a short survey but found already many usefull hints. Especially helpfull: How to enter the capital Sofia.
I was entering Sofia already in 2012 coming from Petrohan pass. But because I had a technical problem but wanted to be in time, I called a taxi that took me in to the city (thanks god, that is always an option for me). This year I intend to come to Bulgaria again. Therefore I will intensively study your website and maybe ask some questions about this or that.
So, thanks again and best wishes
Uwe