XPin™ has re-engineered the Williams Sys 11 Auxillary Driver Board and the Data East PPB board using circuits not duplicated from the original board designs. Using MOSFET technology and innovative circuit methods, we were able to correct the original design errors from the Williams and Data East designs. Check out the Tech Brief http://www.xpinpinball.com/file/upload/file/389 for more details.
These boards are currently in stock.
http://www.xpinpinball.com/shop/product/xp-wms12247
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http://www.xpinpinball.com/shop/product/xp-deppb
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As always, there is a 2-yr warranty against manufacturing defects. Due to the number of games these two boards will go in, I unfortunately have only been able to test them in 14 games. If you have a game that this hasn't been tested in, let me know with a picture of it installed and I will provide you with your own personal promo code for 10% off your next purchase.