OK here are the inspirations behind my cocktail control panel design, not necessarily in order:
Defender/Stargate:

Asteroids (deluxe):

Tempest:

OK, here goes... see attachments below
design 1:
PRO: rotate/thrust/fire buttons aligned for Asteroids, but Defender/Stargate arrangement is compromised slightly
CON: fire/super zapper too close for Tempest
design 2:
PRO: right hand buttons moved up aligned with joystick (more authentic for Defender/Stargate)
CON: rotate and thrust/fire no longer aligned for asteroids and fire/super zapper too close for Tempest
design 3:
PRO: rotate/thrust/fire buttons aligned for Asteroids, Tempest fire button now further from spinner and super zapper farther from fire button
CON: one button closer to FRANKENCOCKTAIL, Defender/Stargate Hyperspace button now must be one of the upper left buttons.
I look forward to your comments...
MRH