Right after reassembling the playfield. Minor details remain but oh well... it can be played
Enjoy.

Thanks for the comments, yeah, previously it was showing around 130 in the Supercharger test. I disassembled it, fixed its diverter and cleaned all the guts of it. Now it is around 80, rolls quite nice indeed.
The credit dot was the left EOS switch, "una boludez", like we say here
The ball shooter needed its plunger changed (it had a smaller one that did not fully hit the ball so most of the time the ball was feeded to the bumpers instead of the top flipper), and the locker ramp needed a small position correction to prevent the ball stuck at 28:10, as well as a fix of its mechanism to release one ball at a time like it should.
Oh and it also needed a small bend of the shooter lane plate to prevent the rebouncing like at 3:05.
All corrected this afternoon, will have to retest it
Another "fix" I did previously was the "Tunnel" hole, I added 4 washers to it to make it deeper and prevent the common bounce-outs from fast balls (like for IJ's Start Mode hole). They do their job quite well as you may note on the video.
Looks like this from underneath:
Hole.jpg

Nothing fancy, just a complete disassembly, cleaning and polishing with Brasso.
Pic:
IMG_1088.jpg

It is off, no legs yet...

@jawjaw: thanks. The 100M super jackpot is on Red Line Mania, not regular Multiball.
@Pinhead87: as I said, this was just a gameplay test to find issues with the game, nothing official

@jawjaw as yonkiman said, maybe you have a different ROM. L-5 is buggy. I use L-2 as it is the best IMO (although it also has some bugs).
Oh BTW I do have the extra post in the top loop.