I fixed my drop targets by adding spring tension, just pull the spring and hook it on further down the spring. It was surprising how much more tension I had to add before they started working correctly. Pretty sure they drop every time now.
The outlane bars being too low can be fixed by lifting the playfield and tapping the bars back through with a hammer and punch....don't go crazy, just a few millimeters. If you go too far the bars have lugs on the sides and may start to lift the playfield around the hole so take it easy. You only have to tap them through on the entrance end, the other end is obscured by the flipper mech but isn't needed anyway. I also raised the small bars between each inlane.
Both tweaks are very easy and take just a few minutes. Obviously we shouldn't have to preform these ' fixes ' but what options do we have? Stern aren't going to take it back. Best we can hope for is they send out the correct springs for the drops. I don't think they'll expect people to replace the outlane bars as there's too much potential for damage so just tap them through a little.

The outlane bars being too low can be fixed by lifting the playfield and tapping the bars back through with a hammer and punch....don't go crazy, just a few millimeters. If you go too far the bars have lugs on the sides and may start to lift the playfield around the hole so take it easy. You only have to tap them through on the entrance end, the other end is obscured by the flipper mech but isn't needed anyway. I also raised the small bars between each inlane.
Both tweaks are very easy and take just a few minutes. Obviously we shouldn't have to preform these ' fixes ' but what options do we have? Stern aren't going to take it back. Best we can hope for is they send out the correct springs for the drops. I don't think they'll expect people to replace the outlane bars as there's too much potential for damage so just tap them through a little.