Did I give you the breakdown on the funky way it stores some of the palettes? They spliced a single palette into three uneven parts for things like the stripes and fonts.
"Luck" is a funny register. Special characters use 0xED. Blitz 2k is a funny beast, a sort of halfway point in the codebase, so it treats the value in two different ways. Some code comes from the original Blitz 64 and uses it as a signed value (-35), and some other code that would wind up being used in subsequent games treat it as an unsigned value (237). That's why you don't see consistent "luck" effects when it comes to pass success, etc.
I'd honestly suggest the plug-&-chug method.