Tabushi... I responded to your PM, but in short I think the E4JS is a great car for the money. I have only run it on asphalt so far and with a 17.5BL motor, but it has been great. It has a ton of steering, has been super reliable and I am totally pleased with it so far. In about another month I should be moving indoors for rubber tire on carpet, so I will let you know how things work out there.
Tim