I own a BC246T that I have not used in a couple of years. Recently, in the last few months I've been able to use it to monitor MDPD. However, I have other county groups I have recently been interested in listening because of where I work (Miami Dade Transit). Do the "recent" changes in the system affect my scanner from still listening whatever I was able to before programmed in my scanner? Would I need to upgrade, have my eye on the new Uniden's portable, specifically the BCD436HP? Thanks.