I am in Alaska. We have to use 2 antennas for a dish 500 system. I need to take an existing legacy dish 300 and upgrade it to a legacy dish 500.the system currently uses a 16 way multiswitch. my question is....Can I utilize the existing sytem, then add two cascaded(with high freq's)sms281's(connected to new antenna), and then tie together to the legacy recievers with 16 sw21 switches?.the reason for two 8 ways is I cannot get another 16 way legacy in time for this one.It's a lot of money in switches ,and I don't know if it's even possible for it to work..