AirArms CD and HW Rekord Trigger Units Interchangeability

[FPoole]

Both units have there locating pins at exactly the same spacing, this is no surprise at I'm told Ken Turner used to build the Mach one triggers for Venom which the CD is closely based on,

As above. Ken Turner did not build the Mach 1 triggers. The company he worked for made the parts for them following venom contacting them to produce the parts which were then sent to Ivan and Dave to build. The CD is trigger in the MK1 tx200's is a copy of the Mach 1 trigger.
Mach 1.5

There are 2 versions of the AA/CD unit for the MarkI's as well. The early ones were screwed together instead of the rivets, like we now have. The sears also look a little different as well as the trigger blade. I have a CD unit that uses the screws, but it has the current blade. I wish I could find the earlier blade, but it works just fine. I modified a blade to change the screw angles and it made a positive, but very slight difference for the better.