I went cheap and bought th basic Decathlon bar-bag; it's exactly the right size and has all the (very limited) spec that I want!
However, the admirably simple strps-n-velcro mounting "system" gives it an instinct to tip back in towards the head-tube - and thus interfering with stuffs (fork-crown light, cables, mudguard etc ... - depending on bike). And it robs your fingers of a few inches of bar-top space [the curse of all bar accesories, of course].
So what would be a good way to get me the benefits of the upmarket mounting systems? The only suggestion I've seen is high-density foam; cut holes for the straps to feed through, which I think might be quite time-consuming without some perfect tool for the job?
Crowd-source me!