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Sounds like good choices. Look forward to hearing your experiences with them down the track. I agree with Eric on holding them near the objectives - that can help to stabilise. Resting on a fence is also a good tip, and tucking your elbows in nice and tight to act as a brace. An outdoor reclining chair is also good if you have one.
The individual focusing is less convenient IMO. I believe they do this primarily to make them more water proof. It's not a deal breaker though.
The only comment I will make is that I don't expect these 20x80 triplets will really be useable hand held much at all. Perhaps for very short scans, but the standard doublet 20x80's are much lighter and can be hand held.
WRT to the tests you performed Dave - I can vouch for the fact that managing the 25x100's is much more difficult than the test you performed with the additional weights. Yes the extra magnification plays a big part - but these are huge, and very long (read awkward). Absolutely unusable hand held in any form. I originally thought I would be able to use them resting the objective end on a railing and swivelling around. Nup! The 20x80TIF will be much easier than these though. A good choice I think.
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