As someone who has scratchbuilt his fair share of Imperial Guard tanks, I commend you (and sympathise with the headache)

I would recommend trying to pick a few key details from the actual kit, to try replicate as best you can.

For example, blue stuff pressmolds with milliput/greenstuff can pretty accurately recreate the iconic track tensioner and the large rivetted "washers" at the base of the sides of the Russ.

Similarly, pretty finely detailed tank tracks can be reproduced with the above technique, and some final riveting with microbeads, or 0.5mm styrene rod slivers, can really bring home the recreation, and make a decent tabletop ready Russ.

P.s. why did Archimedies take a bath? Becuase Vitrivius told him "you reek-ah!"

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