I've followed YT's advise regarding going small on my SYS.TXT and can happily report that all is well with only the bare minimum of lines in it. That includes speech using TTS.
The only issue is that when TTS come son it lowers the background sound i.e radio and doesn't higher it again when it stops speaking. Also the volume of TTS is very low.
Can someone point me in the direction of the correct settings that manage volume for TTS within Primo 2.0 please.