Tomas,
I am using the Spirit on a 450 Pro with a receiver in the main "body" of the heli and the spirit I smounted on the ARB - this was a real stretch with the standard cables and they ended up much tighter than I would have liked so I have replaced them with some 20cm cables.
However the replacement cables are not as high quality (wires not as thick) as the original Spirit cables, but have made the cabling much neater. Will you be offering longer cables for sale on your web-shop?.
Cheers,
Mike