Using Downunder's navcore installer I have my New (to me) Rider 2 updated to navcore 9.500.
I read that these modified navcores will free up some RAM permit the useof at least VocalizerTTS if not LoquendoTTS.
I have the vocalizertts (as well as loquendotts, just to try) in the root of the SD card but the voices never appear in the list of installed voices.
Not a huge deal and I'm happy to have some of the newer features available (winding roads, etc) but if there is a way to get some basic TTS support I'd be glad to have it.
Note: Maps installed support TTS.