I don't buy into the "chains on the front will tear the front end apart" argument on compact tractors.
Tdmdkubota, your BX is not heavy enough to be able to rip the front transaxle apart when chains are on. Even with chains, your tractor still slips a little on ice/snow. If the fronts, while chained, are hooking up that well, then you can always disengage the front wheel drive, but I suspect you'll benefit from the front chains more than not, without having to worry about tearing up the front end..