Hi guys.
First post here, so please be kind with the comments :)
I've been using both 8.3 and Primo on my WinCE 6 128mb Chinese 5" device.
The only real problems I've came across is with TTS voices.
I've tried 9.6.13.267029 which is very stable , but have been unable to get TTS pro working on it reliably , so I tried 9.6.13.263722 using the v7 Loquendo voices that the OP advised only worked ...