I have 2 Gammas - brilliant wee headtorch - I prefer having the weight distributed front and back ( not that they weigh a lot ) and the rear battery pack comes with a built in rear red light which is very useful. You can choose between main beam max 88 lumen, low level and flashing, or low level power LEDs at white, green, red or red flash. Very comfortable and easy to wear for long periods - I've had one on most of today due to no power since 5am!
I have had the Gamma and tbh I prefer the Manta, it seems brighter and you can also focus the beam. The one thing I really like though is that it can comfortably be worn around the neck when not being used so it doesn't get lost, I actually slept with mine on last weekend
I like the idea of focusing the beam on the Manta But from the advice the Gamma balance front and back of the head sound the best. Less strain on the head. So the Gamma looks like the option. Thanks so far All.
I do this with my Gamma as well - just pull the top strap to one side. As I said earlier, the Gamma is by no means heavy but I've always preferred the extra stability of a front/rear distribution with a top strap, especially if you are doing very active things.