Good Morning . My name is Angel and I am from Spain . I bought a Mini abc gambado and was surprised by the quality of materials and completeness that comes to how economical es..cvd , s , bearings , allen screws, two bodies , tires with good grip..I have a problem and is not that engine mount to avoid prejudicing the transmission . I thought of a combo HW justock XR10 17.5 or 21.5 . With these engines would hold the differential gear ? Would put silicone Hudy of 1000000 as I read and exchange the motor plate for the optional .. you give me some advice? And forgive but my English is not very good