@agtrigormortis Dosabian! Thank you... I will check that out. It's all changed from a few years ago.
I'm no good with Linux script. On my acrade build I tried 3 different screens all wider x 16:9 and they all looked awful. I went with a 2000's style 4:3 flat 20inch monitor but I had to get someone to set the PI up for VGA output and resolution and sound output on the headphone jack for the amp. I also used a VGA signal booster. The screen filters on retro arch are amazing for getting the CRT scan lines and barrel shape...I'm still in awe of the display after 3 years!
The guy also took all the things off that take away from a stand alone arcade machine... I found people go for a look in Amiga or PlayStation(keyboard+analogue inputs) and that makes it poor because it doesn't work with pure arcade inputs. I'd much rather get an expert to help with the script though. 😎