You're welcome !
I know some people who have split their LFE signal 4 or 5 times. The only problem is that the signal level is divided by two every time you split it. This means that the signal/noise ratio gets worse but I don't think that it is a real problem in practice.
Remember to recalibrate your system (receiver and subwoofers) after adding your second split. Then you're ready for some shaking experiences
