 You don't need to be an 'investor' to invest in Singletrack: 6 days left: 95% of target - Find out more
Does the handlebar bag foul a bar mounted light (I think it may) and if so any hacks around this.
I want to use my Ravemen PR1600 with one.
Ta
Yes.
There are many extender brackets available. Minoura Space Mount for example. I made one with four reflector brackets and an offcut of plastic tubing.
[img] 
[/img]
[url= https://www.flickr.com/photos/druidh2000/14919198498/ ]DSC_0150[/url] by [url= https://www.flickr.com/photos/22384952@N02/ ]Colin Cadden[/url] - [url= https://play.google.com/store/apps/details?id=com.dariogf.flickr2BBcode ]Flickr2BBcode[/url]
Yes it does foul, Ortlieb do specific adapters for them though, not sure if that's what you were after or just a workaround Ortlieb Ultimate Adaptor Support - Spa Cycles
 I made one with four reflector brackets and an offcut of plastic tubing.
Genius - entirely justifies the drawer of random-things-that-will-come-in-useful-one-day
I was not aware of the adapter support. I bought one of these which I've mounted mid fork on the pannier mounting point, though they cam be mounted on the QR instead
https://www.sjscycles.co.uk/lighting-spares/black-origin8-eyelet-stub-light-mount/
I've also bookmarked this as an option, though I'm running drop bars - this may not be an optionon straight bars