Woodcutting blade on a 14 abrasive chop saw- why not?

I was thinking that I'd be able to also use it for crosscutting thick stock, like 4x4's if I put a 14" miter blade in it.

However, the instructions explicitly say not to use a saw blade of any kind in the machine. I find this suprising. Any idea what would be unsafe about cutting wood on a machine like this (except that the fence is pretty tiny)?

I am building a timberframed woodshed, and a large diameter chop saw would be REAL handy, so I may give it a try.

The milwaukee cutoff machine has a very nice steel retracting blade gaurd- better than the one on my old Makita 10" miter saw, which is plastic and binds up all the time. This is one of the older, simpler gaurd designs that (supposedly) retracts when it comes in contact with the work. Because it does not work well, it is more of a hazard that a safety device.

I suspect that the no-saw-blade statement is to satisfy Milwaukee's legal dept., and if I am very careful it will be a safe operation. I'm going to call them today and see if I can get an answer from a tech.