Would this work?

Nope. It would bounce out when you hit a bump.

https://www.batteryjunction.com/twofish-lockblocks.html

depends on the weight balance and handle grip style of the P7 in question.

and when you hit a bump, it'll rattle around.

sure it would work, 1st pothole or bump you hit and you will see if your p7 is impact resistant.

Just get a lockblock, they are cheap and they work..

There are lots of mounts on DX...have you looked ?

Use the Wald bracket and then use two O-rings Dinotte style.

Just order this clip for your flashlight.
https://www.dealextreme.com/details.dx/sku.15642

Cheap, easy, and works perfectly.

+1 works perfectly on my 2 x 18650 Aurora.

Might be a little large for some single 18650 torches though ?

https://www.dealextreme.com/details.dx/sku.8274 <- got one on each bike. Gets the job done.

I've been using a DealExtreme P7 this spring...I know, I know*...and the twofish block has too much vibration for my tastes. I went to BatterySpace for their flash light mount. That one is more solid but the clip seems to be weak. Using the bottom half...the one with the thumb screw...of the clamp, a piece of nylon cut to fit the bottom of the clamp, a flat head screw and the BatterySpace handlebar mount for their halogen lights, I fashioned a good solid mount that slides on and off my existing headlamp mounts.

I made a helmet light from the BatterySpace helmet mount that's even better than the other mount. Using a Cateye reflector bracket, a bolt, a few washers and a nut, I was able to make a mount that tilts and is adjustable. I'll post pictures later.



*Yes, I still use and prefer halogen. However, for the last few years, I have been using LED for spring riding because I just don't want to mess with the larger system when I only need 'some' light for 20 or 30 minutes before the sun comes up. I got some external battery packs and some dummy batteries from Turboferret and I'm going to experiment with the MTE lights I have. But I still like halogen for brightness and color

By the way, the MTE 2 mode flashlight is way better than the 5 mode one

I found this if you have a steel fork. https://www.nashbar.com/bikes/Catalog...archTerm=besso*
You can mount the light low with a two fish adapter. The beam spot on my Romison is more eliptical and covers more ground.

I've seen these in another thread, but they don't seem to exist in the uk....

I bought a set of the twofish blocks. Look elsewhere. I have a very small flashlight in mine, and it rotates. Not right away, so it's usable.

Helmet light on the left, bar mount on right



Helmet light on helmet




The bracket on the helmet light lets me adjust tilt better than the flashlight mount offered by BatterySpace

The clamp, spacers, bolt and mount for the lamp. The mount is from the BatterySpace helmet mount



The handlebar mount and clamp



A 10-32 flathead screw holds the clamp together



The flashlight has to be shimmed slightly to get it to fit in the clamp.



On the bike



The lamps can be easily and quickly removed while the mounting clamps can be left in place so that the lamp doesn't need to be readjusted each time. The mount is also much more steady then the TwoFish blocks. There is very little vibration while riding.

The future project is to make the lamps run longer with external battery packs. Here's the battery case and dummy battery from Turboferret

I've found that due to their width and weight the larger brother of the lockblock, the cycloblock, works much better for P7, MC-E, or any 18650 battery light.

-1 again for lockblocks with P7s.

using a pair of lockblocks will work, especially for 2x18650 lights.