Thanks guys for the feedback. No, I don't intend to steal bikes, just to avoid getting another one stolen ;-)
I guess only hardcore thieves carry hydraulic jacks
I'll check really small U locks like Kryptonite's NY lock instead of bigger U locks, which is probably how my last bike got stolen (left too much space between lock, frame, fixed point).
BTW, does someone know what the dimensions mean, eg. "3.9” 10.3” (10.3cm x 26.1cm)" for the New York Lock M18-WL
? Before ordering it, I need to check the size of the inner space to check that it's big enough to connect the frame to a fixed point.