Nikon Speedlight SB-700 won't fire brighter than about 1/2 power
I'm experiencing a problem with the Cactus V6 and Nikon Speedlight SB-700 combo in Rx mode.
With the V6 Tx unit set to 1/1 power, and the V6 Rx unit under the SB-700 showing 1/1, triggering the flash from the Tx unit's test button produces a bit less than a 1/2 power burst. It does this consistently. I can adjust the power up and down without a problem from the Tx unit, but there's little or no difference between just under 1/2 power and 1/1 power in the brightness of the light or the (too-short) recycle time. If I press the test button on the Tx unit, however, the remote SB-700 will fire slightly brighter, still not 1/1 but closer.
Then, if I put the Tx unit (no flash attached) onto a camera, and press the shutter button on the camera, the flash will fire near to 1/1 power. If I press the Tx unit's text button after it has been mounted on and fired on the camera, then the remote SB-700 fires at near full power.
I can tell all this from the brightness of the light and the length of the recycle time. It's pretty easy to discern.
The problems are the same with firmware v1.052 and v1.060 loaded in my set of V6 units. The SB-700 profile has been correctly selected.
In brief testing with a Canon Speedlite 600EX-RT in place of a SB-700, things work fine: the remote flash fires at full power when the Tx unit is set to 1/1. The problems appear to be relegated to the SB-700. (Plus I see mention of a similar problem affecting another user and his Speedlight SB-910 in this thread.)
Please advise if I'm doing something wrong, if there's a workaround or if a fix can be made in a future firmware update.