@Revelation, I took your picture, you depicted within your starting post, for my comment.
The (rest) position of the vibrato arm is not the way, I used to have it on my guitars.
Generally it is like the way you see it on the 513 pic, for use quickly turned 180°.
This guitar is the only one I regret to have determined the position of the switch. The reason is not the whammy bar.
If this would have been one of the four factory assembled prototypes, the switch would have been in line with the potis, but close to the jack.
I decided for that model very belated. 1993 it was announced as a new guitar series by a test in a guitar magazine, but they never made to that status. 1995 I remembered the guitar, called the manufacturer. And I learned: Not continued. In the shelves was a remaining body, neck and all hardware.
I decided to put the switch close to the lower horn for ergonomic reasons (and very much later I learned that Atze Goelsdorf had made a guitar with that design in the 1980ies, and the switch was on the front, too.
https://www.dieter-goelsdorf-history.de/de/story/einiges-was-vor-göldo-und-duesenberg-geschah-....html, if you are not familiar with Goelsdorf, he invented the Tru Tune Tremolo, the archetype of double locking systems, EVH was one of the first he used them in his Kramers.).
Anyways: By strumming the switch is in my used vector, and I need to play with a lot of attention to prevent me from unintended switching.
But as I said: We could adapt.