Hey thanks Kurt,
Just experimenting
Ok I downloaded this online manual which has helped [my original hardcopy is now in tatters].
The way that I plan to use my setup is to entice the bugs to a pre-determined point using sugar-grains as bait.
The camera will be tripod-mounted and 'attended' by me.
The MT-24ex attached to another Flex TT5 will be light-stand-mounted - 'unattended'
I contacted Pocketwizard recently, they have replied that there should be no problems in experimenting with using this combination of gear as nothing will get damaged --> so that's a relief.
I have now experimented with this setup without a camera-body, to see whether 1xTT5 acting as a trigger, activates the remotely mounted TT5 & MT-24ex --> wahay! it works perfectly fine!
What isn't clear is whether the exposure is accurate. Will need to get a new camera body very quickly.
Also, I am not sure whether the MT-24ex in conjunction with the Flex TT5 will support E-TTl/TTL.
Page 8 of the MT-24ex manual does show the the flashgun's LCD PANEL features for E-TTl/TTL, I just need to check whether the PW TT5/MiniTT1 can trigger this flashgun in these modes.
Certainly, the actual hand-held Flex TT5 in 'basic-trigger-mode' is successfully firing the TT5/MT-24ex
combination which is just so cool to experience.
Obviously I still have to Test further with an actual camera to be sure that these work too:
flash-ratios
HSS
FEC
2nd Curtain synch'
For now, Stage1 is accomplished. Thanks for pointing me to the Canon MT-24ex Manual