I have the K-drill and the Clam plate set up with the same drill shown here. I bought the Clam plate because of reviews on this site and others that recommended using the plate if you are older (I am) to help with some of the tourque from just a plain drill and handle. I also had read that the drill plate will take some tourque off the drill also.
BOTH of these things are correct !! With the drill plate set up it is easy drilling and I don’t feel any affects after 50-60 holes liked I drill on Sat.
As far as the trigger issue – NAH – just make sure you have everything lined up right on your set up and you are good to go. I think the guy in the video just needs to do some minor adjustment with where his trigger is hitting and everything will be fine. I LOVE the K-Drill and clam plate set up.