Great job!

On bingos, and especially helpful on Ticker Tape and later six card bingos, you can lift the back door off the hinges, and lay it across some saw horses.

Ensure you unscrew the wire bundle clasp inside the cab so that the bundle can move and flex.

The switches attached to the shutter motor are consistently an issue. It is trivially easy to smoosh those switches when lifting the playfield. Some of those problems can drive you absolutely crazy.

The search can happen any time after ball 4 is shot, regardless of winners being present.

Ball difference is magnetic vs. non (anti-cheating!). Ticker tape uses 1 1/8" balls and the stainless can eventually become magnetized. The brass, chrome plated balls are very expensive. If you find a source for inexpensive balls, please share!

I scoped out your pic above - I see you've repaired your randomizer where it was cut, but I wanted to draw your attention to one issue that's still present: on the right hand side of the randomizer, there's a big trace that was cut very well, which is preventing about half or more of that side from registering.

You can stitch a piece of wire across the broken trace as long as the wiper arms don't contact it. If the do,then you'll need to stitch a longer piece across an area that they do not contact. Essentially, you're just joining two sets of traces.

Both this machine and mine had the traces cut in a very professional way. You wouldn't notice it unless you were looking for it. Sneaky!

In Ticker Tape, the randomizer provides a chance at lighting corners and super lines for each card.

You're right! They have max coin inputs, too, which is helpful. In Ticker Tape's case, only 6 coins will start a full game. Randomly it will light the super line or corners on any given card (one coin per card). Super lines are horizontal and score 3 as 4 and 4 as 5.

Corners score the 5 in a line win.

Cards have ascending replay values for 4 or 5 in a line. It is in your interest to play for 5 on card 6.

Pressing C on the footrail starts the search for winners, and when it finds one, the backglass will flash double or nothing? At this point you can press r to take the regular payout or press d to try for double the replays. The position of the randomizer is important here, too - in the wrong spot, you'll get nothing.

Fun, fast game (no extra balls).

Only the 6 cards made in the 70s have that double or nothing feature.