Having recently obtained the rv30 I didn't initially understand why it claimed 4 maps with a description of 3+1. consequently it was only after using it that I realised that means you can only save 3

I realised, rather late, that the 4 maps expressed as 3+1 meant that I can't actually save 4. But I live in a split level house so I do need 4. Is there any reason you can't support extra maps? Or eve