for anyone who wants the skin to function a hell of a lot better, set the hitposition to 432. works like a charm :p
heres how i set everything for 4k in the skin.ini file:
Version: 2
[Mania]
Keys: 4
//Mania skin config
ColumnStart: 100
ComboPosition: 111
HitPosition: 432
SpecialStyle: 0
UpsideDown: 0
JudgementLine: 1
BarlineHeight: 0
LightFramePerSecond: 0
ColumnWidth: 53,53,53,53
works better and feels better for me cause im used to the highway being on the left side.