I don't have the artwork you need, but you're doing the right thing. The Reverse button placement on the Multi-Williams panel is really bad... Too high up and far away.
That isn't exactly what I meant, but I am aware of that problem as well. I actually wanted to move the "Inviso" button next to the Reverse button. This would in effect move the Reverse button closer to that joystick as well.
Why? might you ask? Well, with the button arrangement like that it does open up controlling Mame games that use only buttons.
This panel gave me the idea (scroll down a bit):
http://www.ourvictorianhouse.com/CraigsArcade/Roswell%2088201/Roswell.htmlYou can clearly see the "Asteroids" configuration in that button layout.
The side effect though is that the button arrangement wouldn't be accurate for Stargate. BUT just about everyone I know prefers the original Defender anyway. I never played Stargate myself in the arcades. It was kind of a rare find in my area to begin with. I will say that if room permits, I can just duplicate the button so the panel would be Stargate accurate, BUT considering that I am going to make a smaller cabinet, I am not sure if I will have the room.
But that is what I meant about moving a button. But it does fall into place that the addition of that button AND making a smaller panel will dictate moving the reverse button closer to the left joystick. I do agree with you there. Since I DO have the original Defender measurements...the button on the Multi-Williams is way off. But I guess they did it that way mainly for Joust.
Does this help ?
(attached)
Well, not really. I was looking for the measurements for the button/joystick placement centers. With that info I can see how I can scale the panel down. The artwork might come in handy IF it is scalable. However, scaling it down would change the finger to finger button placement and that is what I would like to avoid. More then likely I would have to alter the spacing between the left joystick and two buttons with the right joystick and it's group of buttons.
Overall I believe the original Multi-Williams panel was meant for a 24" by 8" mounting. 24" is WAY too large for a bar top cabinet. I would be thinking more along the lines of an 18" by 6" panel as that size would still allow me to use a 19" LCD monitor in the cabinet. I am pretty sure I can get all the controls in that size, but it is the spacing I am concerned with. I DID want to use the Multi-Williams artwork and this new size could present some problems. A cardboard mock up is definitely in order, BUT I need the dimensions to start with.
Geo