I didn't realize there was an AP club. This was my first pin and I still have it. I've got repro BG and plastics installed. I'm still mulling over whether or not to get a repro PF.
An upgrade I did some years ago is replace the horseshoe switches with leaf switches. AP works fine with switches staying closed when a drop target is down.
IIRC, I purchased a 5 bank drop target assembly from Jungle Lord to get the bracket for mounting leaf switches. I've had very reliable drop targets after this conversion.
Here's a post where someone did the conversion and has a pic: https://pinside.com/pinball/forum/topic/alien-poker-switch-matrix-problem#post-2263724