Yep, well & truly hooked!!!
And the next questions:
ESC
So I don't have to use the Tamiya ESC unit with the Rock Crawler, but how do I decide which one to buy?
Looking at various websites, there appear to be dozens of the things, ranging widely in price.
Some talk about the number of motor turns, others say brushless.
How do I know what to get to match the stock motor that will come with the Rock Crawler?
Are the Tamiya speed controllers OK, or overpriced and just paying for the name?
Which Tamiya ESC would I go for if I decided to get a Tamiya one?
Battery
Will any 7.2 V pack fit, or are there different sizes depending on Ah rating?
Thanks everyone for your advice & input so far.