If it's leaking it needs to be replaced. This is what you need

http://www.imex-model.com/product/TA...IT.html?cid=90

It may be close to new, but I can see at least two mods that have already been done to it, moving two of the switches and remounting them so they're accessible through the driver and a-drivers hatches. I'm pretty sure Imex doesn't do that yet, but I'd have to check with Erik to be sure.