There are various HobbyBoss versions, but I don’t think they cover any A6’s. I haven’t got any of them yet, as I want the HB Leo 2 C6 with slat …[:P]
The Revel 2 A5/A6 is a re-pop of Italeri’s version, It’s cheap, but there are issues…
It’s their A4 moulds re-jigged for the A5/A6, rubbish tracks way too stiff, soft details, the side ‘grilles’ are moulded into the track covers, & will need a lot of 'fettling"
The Tamiya is pretty much ‘Shake & Bake’, has crisp details, decent tracks, there is an Eduard ‘Zoom’ PE set (Just enough PE to actually IMPROVE the kit details) the MG3 is pretty good, has 2 figures(?) & includes a decent painting guide, & looks right…
There is a Voyager PE set for the Trumpy Fransiska, but isn’t needed to make a good kit, a double-CD sized pack … Every now & then I get the pack out, realise there are more PE parts than kit parts, & put it away again! sigh
Trumpy’s Faun SLT56 Fransiska, (& it’s cousin, the SLT 50 Elephant), are SFAIK, under-powered to carry the A6, & bothe the tractor & trailer needed to be modified to carry the 59.7 tons A6. Other than the Wicki mentioned extra shocks & verticaly stowed ramps, & don’t know specifics…
So Yes, it could be used to carry the A6, as only a German Tanker would be able to tell the differences!
more here: http://www.panzer-modell.de/referenz/in_detail/56t_trailer/56t_trailer.htm
http://translate.googleusercontent.com/translate_c?hl=en&sl=de&u=http://www.panzer-modell.de/referenz/in_detail/franziska/franziska.htm&prev=/search%3Fq%3Dfaun%2Bfranziska%26hl%3Den%26sa%3DX%26rlz%3D1I7RNTN_en%26prmd%3Di&rurl=translate.google.co.uk&usg=ALkJrhit5bdIqAORDqth-1faQkn8Hr7zEg
PMMS review here: http://www.perthmilitarymodelling.com/reviews/vehicles/trumpeter/tr00203.htm
Wicki translated here: http://translate.google.co.uk/translate?hl=en&sl=de&u=http://de.wikipedia.org/wiki/Schwerlasttransporter_der_Bundeswehr&ei=D5YcTK3CMYHu0wTv3emrDQ&sa=X&oi=translate&ct=result&resnum=6&ved=0CCwQ7gEwBQ&prev=/search%3Fq%3Dfaun%2Bfranziska%26hl%3Den%26sa%3DX%26rlz%3D1I7RNTN_en%26prmd%3Di
Enjoy… & blog it! [:D]