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The WL Toys 144001 is an excellent low cost hobby grade RC buggy that I ordered from Banggood. I've already taken free and low cost steps to improve performance in part 1 and part 2 of my upgrades guide. This upgrade guide here is dedicated to installing a powerful and efficient 2838 brushless system that is optimised for balance, handling and efficiency. It will also be much faster and reliable that the stock system.  As mentioned above the brushless upgrade I am doing here is based on a smaller, lighter more powerful motor than stock so I can get the best handling by reducing weight and improving balance. For this reason I have chosen a brushless 2838 sized motor (28mm diameter, 38mm can length) that runs at 4500kV. This is the same spec powertrain used by the premium LC Racing EMB-1h on which the 144001 is based. The objective is to optimise handling by removing the extremely heavy and power hungry but inefficient brushed 550 motor. I have not gone with a brushless motor the same size as the brushed 550 (3650, 3652, 3660) as these are really only suited to speed runs although this will be an upgrade I'll do later on with my second 144001. Benefits from this 2838 brushless setup over stock will include:
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Motor size comparison: The stock 550 weighs 271g and the new, more powerful 2838 weighs 95g. Damn!
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Note, this is not a review. You've probably seen a ton of those already. This is about how to set your car up once you've already bought one. 
Firstly, "must do" is a bit strong and a bit of a pisstake of the clickbait Youtube videos out there. With that said I do strongly recommend them if you can to get the best performance out of you car and extend it's life. I've arrived at these recommendations by comparing the 144001 directly to the car it was copied off - the excellent LC Racing EMB-1h plus basic fundamentals of rc car operation of which I've been around for years.  Factory shocks are overfilled 1. Fill (or empty) the fluid in the shock absorbers to the correct level After a lot of feedback to the community, WL toys has started filling up the shocks with oil but now isn't too little but too much they are putting in. Too much oil in your shocks means that the shock cannot be fully depressed it will ultimately force the oil past the orings and in doing so damage them. The fix is easy and if you follow the method below you won't need any extra oil to top it up. Remove the shock from the car by unscrewing the lower philips screw and upper lock nut.
Now that the shocks can fully compress it allows the spring to do their job properly. I found with the stock setup I needed to loosen the spring tensioners right up on the front and about halfway down on the back for the right right height. This is a good starting point and probably the next place you'd consider with the shocks is increasing the oil weight in the back because the dampening is pretty light - probably around 60wt oil would be ideal.
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