This thing goes pretty fast, handles reasonably well and the suspensions turned out to be well designed as they can soak up a lot of punishment, jumps, whatever. The weak spots are the hinges but mostly the lower suspensions since they can bottom out and explode if faced with excessive jumps... if you need it to be more heavy duty, replace the central suspension with a block: this will transfer everything to the top suspensions increasing the amount of stress the whole thing can handle. All wheels use their own engine, keep that in mind as mirroring messes with that. This has also a full set of control surfaces to help with jumps that would make it land poorly.