Breaker One-Nine:
Is this statement true?
If you drive a mixture of analogue and digi equipped truck’s you must carry print-out’s from the digi tacho.Even if you only did 1 day out of a 2 week block in an analogue equipped truck you must print the other day’s in that block from your digi tacho
No it’s not true it’s complete nonsense 
The data for when you use the digital tachograph is on the driver card which should be carried at all times, and the record of using analogue tachographs will be on the charts which should also be carried for the current day and the previous 28 days.
No printouts are required unless you need to make a manual entry on one for any reason 
Thank you Tachograph. That is all I needed to know.