I'm a bit confused.
I'm looking to install a coindoor in my cab.  I'm probably looking to purchase a "new" one rather than get an old one off ebay and worry about cleaning it, etc.  So I was looking at Happs and the over/under coindoor.  But there are several different styles, with different prices, and different mechs.  I'm not sure which one I need.  I also want to be able to use the BYOAC tokens instead of quarters.
So what should I be purchasing to get a working coin door (2 player cab) with working mechs for the tokens?  Do I need to purchase a fully unit then just replace the mechs?  Can I buy it all in one shot?