Im sure there are some tutorials around for the gen1 AWD upgrade...pretty easy install that most parts and bearings get installed on the front wheel towers.
larger wheel diameters can be found online or with a little fabrication be made out of almost any mini-z AWD design...you can visualise the minor differences in swing shafts between mini-z AWD and gen1 xmod and with a tiny bit of work make mini-z rims useable.
welcome to the forum
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