This thread is quite amusing.
Stampy stick with it, the xxx4 is a very good car although it's not the BEST car for rough tracks it is still highly competitive. When I first got my XXX4G+ with a Novak GTB, Velociti 6.5 it was a lot of car to handle and crashes/breaks are going to happen, it's part of racing. There has to be weak points on the car or else you will break chassis, on the XXX4 the week points are the shock towers and the pivot blocks/arm braces. Don't bother with getting aluminum braces or pivot blocks, you want them to break and not your chassis. Double up on the front shock towers and get longer screws with washers and go right through the bulkhead then bolt it together, don't worry about the rear tower. Google search this "how to bullet proof your xxx4" it has some great tips on making your car much stronger but wait until your driving skills are good enough as again you want certain parts to be weak points. If you can find them, the older plastic front diff covers and arms are much more forgiving. Make sure you build the diffs properly and break them in as mentioned in the manual. Also make sure your slipper is very tight if you are running a very fast motor. I almost 'lock' the slipper. If you 'glaze' your slipper pads/pucks (can happen very quickly if the slipper is too loose) your slipper won't work properly, a quick fix is to sand the glaze of the 'pucks'. Another suggestion would be to turn down the throttle profile on your transmitter if you can, or on your esc if you can. Learn to drive the car well before you start driving fast. What else?? get some shrink tubing and cover the dogbone where the CVD pin goes through (you might have the newer version with LCD's) I had issues with the slipper clutch flange rubbing on the belt tensioner arm but I realized my slipper was too loose so tightening it up solved that problem. Keep at it Stampy. The XXX4 is raced much more in North America than in Europe so you might want to check out
www.rctech.net as there is a ton of info on the xxx4.