You could use some kind of adapter cable, with bullet plugs for the lipo on one end and a Deans connector towards your ESC - although I would not recommend this, as each connector will add some resistance, etc. In racing, plain bullet connectors are standard.

Serpent has an interesting TC, with a non-standard design: http://www.rctech.net/forum/electric...oject-4-x.html, but by being a non-standard design, it maybe a little harder to understand how it works and in finding a good setup. Also, if you break something on race day, it will probably be much harder to get replacement parts than with a brand like Xray or Associated.

For most classes in electric racing you'll need a 190mm chassis, so I never bothered looking at a 200mm car - sorry can't tell you anything about that NATRIX.