I only charge at 1.8A and wait for it to cool down before charging so will not experience the battery exploding and yes I have witnessed it before. I have also witnessed a lipo battery explode which in my opinion is far worse. I will be getting some lipo hard packs soon so will be a lot better than your standard packs.
About the markers thanks a lot Marc will be greatful for making a track. Anyone wanna try the concentric circles again.
