Problem with the spacer wedge or riving knife not retracting below the top of the blade when clicked to that position for doing hidden cuts. Very frustrating as on inspection the assembly is working safely and unobstructed. Any ideas from users to adjust or solve problem. We no longer have the manual to refer to.
Welcome to the Festool Owners Group!
There aren't many members who have the CS70, as it's not available in North America where most of our members live, but there are a few European owners, and hopefully one of them will be along shortly.
Did the knife retract below the top of the blade at one time, or has it never done so from new?
I don't have the CS70, but on my CS50 the knife can be removed quite easily by removing a bolt and the knife retaining plate with the hex key, and then the housing can be cleaned of sawdust which might be jamming the mechanism. The knife can be rather stiff to move.
The manual is available for download at http://www.festool.com/webmanual_international/images/bedienungsanleitungen/zug_kappsaegen//468027_001_cs_70.zip