My Haunted House pinball is now kicking the ball from the basement to the main playfield once every twenty or so fires. It has the pop bumper board mod installed as well as the A-4893 coil installed and a new sleeve. It worked great for a couple weeks but now its not making it up all the way. I know it has to be in the tube adjustment but I was wanting to see if anyone has worked on theirs that can give me some tips.

I found it out on my own eventually. To adjust the tube, you actually don't touch the tube. There is a U shaped bracket on the lower playfield that pushes the tube into the correct spot. There are two screws mounted in slots that hold this bracket in place and you just loosen those and slide the bracket around until you find the correct spot and tighten it. It is a lot of trial and error but I finally got it.