PRO-94: As long as you program all your TRS's in different banks such as- bank-1=MOT I, bank-2=MOT II, bank-3=ED, and the ED system is in LCN order,.. and your close eneough to get all three systems CC's, then you should have no issues at all in scanning all three.... and if its a 94 B, then you can also program in conventional in the other banks in side A and be able to monitor all three trs's and the conventional with no problems.... When your dealing with the dual system.. aka Side A chans 1-500, and Side B chans 501-1000 you can only scan one side at a time. That is the only real issue I have ever had with the PRO-94, that you cant run all 1000 chans at onece,... only 500 at a time, unlike its big brother the PRO-2052.