[suicideneil]

4Kgs isnt too bad for a fully loaded truggy, especially whehn its the same power train as would normally be used in a 5-6kg truck afterall. I loike your chassis stiffener bar, looks like it does a good job to prevent chassis flex. Whilst everything fits on the chassis okay, the layout isnt the cleanest I've ever seen, but with a bit of thought and effort it could be tidied up I reckon- stick the rx behind the lipo and get make a simple tray for the lipo that bolts to the chassis to hold it more securely. If the brakes are rubbish and you cant afford a better esc at the moment, think about a mechanical brake if theres room somewhere to mount the servo and linkages.

Overall not that bad, not bad at all.