Quoted from Vyzer2:Not as experienced as you so just asking a question. Will take a closer look at the dt and see if there is any adjustment I can make.
Don't fret about it. People have different levels of experience. A year ago, I was afraid of even removing a bulb lest I cause a short.
The drop target issue is mechanical. A lot of us have it to a certain extent. There is a thread about the drop target not staying up which also mentions some things to try when it won't go down. Basically, loosen the four screws under the play field that hold the bracket in place and try to push the target as much forward -- towards the player -- as you can. Mind you, this will only be half a mm or so. There isn't much play. But it may be just enough to solve your problem.