I ve been adjusting my Mame on LCD , and found out the best result the way it looks is when i put my Brightness settings from my lcd to the max.

Also the contrast needed some adjusting , after that play around with CRT-GEOM settings.

It doesnt look nice on windows as its too bright also Hyperspin is bright except when the game starts

Could it be possible implementing Brightness Contrast Gamma settings in RLauncher to display the HyperSpin menu wheels with each his own Brightness Contrast Gamma setup

i can recommend everyone with lcd in their cab to put the brightness all the way up then mess around with Mame settings