Pascal's board without question. Solid reliability and some really nice features you can activate if you so choose.
A friend of mine has had one in his Joker Poker for over a year now. No bugs or glitches, and some of the options include an attract mode (inserts flash and chase), and a skill shot for the upper lanes. Of course, you can run it as original as well.
If you're keeping the machine and don't mind waiting, get a Pi-1. If you're flipping the machine, get the Ni-wumph. The Pi-1 has more neat features than the Ni-wumph. If you're looking for the Cadillac of System 1 boards, get the Pi-4x, it combines the MPU, driver board and power supply all in one board.
Currently Owning: Vids- Road Blasters, Road Runner, Joust, Golden Tee 2005 Pins- Back to the Future, Theatre of Magic, Joker Poker, Grand Tour, Hyperball
Previously Owned: Vids- Far too many to list Pins- High Speedx2, The Shadow, Mystic.
I have had good experience with the Ni-Wumpf replacement MPU board (purchased and installed three or four of those in the last eight years). I am also impressed with David Humphrey (Ace, Ni-Wumpf) customer support.
I sold a Close Encounters Sys1 Gottlieb pinball machine with a replacement MPU (Ni-Wumpf) board to someone local, over seven years ago (wow, time flies!).
That person recently contacted (last month), indicating that the machine would no longer coin-up nor start a game. I went over his place and quickly found that although the machine would properly boot-up, it would not react to any switch, not even the diagnostic switch. Connectors were all fine, no short or disconnected wires in the cashdoor harness/switches. +5V fine. All pointed to an MPU issue.
Went back home and emailed David Humphrey (Ace, Ni-Wumpf) details about the symptoms of the board, and for advice, since the MPU schematic is not published. I was not sure if we had to send it back for repair or get a replacement chip from them.
On the next day, David replied back with a note that he was pretty sure that the issue was with the U1 switch strobe TTL chip on the board (a 74156), and that I should try socket and replace it first (I always socket chips anyhow, good advice). He also offered to send one for $1 plus shipping if I did not have such part locally.
I did not have that exact part but had a lower power 74LS156. I emailed David back indicating that I would now search locally for an exact 74156, as the LS part is lower-power and drive capability. David replied back on the next day indicating I should try the LS part anyway as the switch matrix inputs do not require much current to detect.
Thus, I removed the old chip, installed a socket and the new 74LS156 part, and that fixed it ! Of course I sent another email to David to share the result and to sincerely thank him ! My customer was also very happy as his machine was back in action.
I am really impressed with Ni-Wumpf: - the board lasted seven years without a glitch - great customer support even after all that time - exact pinpointing of the issue via email, did not need to send the board back.
Now, I understand that Pascal Janin's board is a marvel, but the waiting list and distance turned me off... but this is just me...
Good luck !
Cheers, - Sylvain.
Looking for 1966 Bally Capersville, 1967 Bally The Wiggler, 1981 Stern Viper, 1986 Pinstar Gamatron, 1986 Williams Grand Lizard, 1991 Williams Bride of Pinbot, and a few others. Cash or some trades available. Could also repair a machine of yours +/-$ if needed, in exchange for one machine on my want list, non-working/unshopped welcome!
I have no experience, but am likely going the X4 route - as it replaces almost everythiing that could wrong in the Sys 1. My dilema is its price - as its almost the "price guide" value of a Sinbad @ $300+ - and a Sinbad's only "worth" $450..., and then to hear everyone trash Sinbad's gameplay, makes me wonder if its worth it.