RAVEMEN FR160 Daytime Visible Bike Headlight for Computer Mount

Just to illustrate the "under mount" mounting:

Using the Varia mount:

And now the GoPro mount with Garmin adapter:

Thanks for showing/posting this @mark1a - helped make my decision, and overall this is a great setup. One thing I'll note for folks with this, is that Garmin makes a couple of different "out front" mounts. The one I believe shown here (and my preference) is what they call the "Flush Out-Front Mount" - where the mount arm comes out at sort of the midpoint of the clamp. This puts the computer and your light parallel. They have two other mounts, the "Universal Out-front Mount (Varia)" and the "Extended Out-front Bike Mount). Both of those have the arm at the top of the clamp (meaning your computer/light will be higher in relation to the clamp/your bars). The only difference in those two (that I can tell) is that the Varia has this angled mount on the bottom for the Varia (and I'm not sure there is a bottom mount for the "Extended Out-front Bike mount - can't tell from the single picture that's only from the top). See my writeup on all this and more photos here.

All of this is to say that I'd factor in two things when choosing the mount:

1) Do you want the computer and light to be at the same angle? I think that works probably for a lot of folks where you want the light pointed straight forward, and are ok with your computer being "flat" as well. But, if you want to angle your computer up, then you may want the Universal Out-front Mount (Varia), so that the computer can be angled up, but the light still more forward (or slightly down - I don't think you can change the angle).

2) Do you want the computer higher up, and thus use one of the non-Flush mount, or lower down, which the Flush mount does.

Personally I'm favoring the Flush mount, as I like the computer close to flat, and that works best angle wise with the light (it's possible the Extended would do this, if someone can confirm that it has the underside mount). Anyway, overall, just beware that there are 3 of these (not to mention K-Edge and others make plenty of others too):

Flush mount: https://www.garmin.com/en-US/p/571684

Universal (Varia): https://www.garmin.com/en-US/p/521668

Extended: https://www.garmin.com/en-US/p/136771

Edited 7-April-2023 to add link to blog and pictures of my setup.

And here's a pic with the Universal Varia mount (note the angle difference).

Nice setup. What piece did you use get the undermount? I currently have the Zipp stem mount that has a GoPro attachment. I want to replace that so the light can go there. Don't know what to purchase.

Thanks and yes, the bottom photo is the S-Works Venge stem with the proprietary out-front mount, so similar to your Zipp setup. It has a GoPro mount on the bottom, and then I used a GoPro <-> Garmin male quarter turn mount adapter to take the top of the Ravemen FR160 light (also works with the Fabric Lumaray / Lumaray v2 and the old style original Garmin HL500 headlight). 

The mount adapter came from eBay a couple of years ago, and the original listing is no longer there. However, this looks very similar:

https://www.ebay.co.uk/itm/166026486880

Also try searching for "Trigo TRP1936", just make sure you get the correct side of the GoPro mount. 

Review imminent?

https://road.cc/content/tech-news/five-cool-things-coming-soon-296043

(I just thought "I've seen that somewhere before and not that long ago...")