I'd be interested to know how other users of these triggers set the dip-switches.
The are four dip-switches on both the transmitter and receiver units, which I guess are designed for complex muli flash setups where the user can enable or disable certain flashes from the camera position. Also, possibly in a situation where one transmitter is being used to remotely fire a camera fitted with another transmitter to fire off-camera flashes.
I'd assumed it didn't really matter how the switches were set as long as those on both the transmitter and receiver were in the same position. So I set them with two switches up and two down (just a random choice).
After playing around a bit more, however, I'm now wondering if this might be why I was getting very poor performance from my triggers. (see the above post where I explained that I was having many missed shots where the flash didn't fire). I tried some other combinations of dip-switch settings and found this improved things a lot.
Perhaps I was getting some kind of interference (from wi-fi etc) on the initial frequency I had set, and this was the reason behind the misfires. Will have to do a bit more testing later on, but changing the dip-switches certainly appears to have helped - just after taking about 30 test shots and no misfires at all!