Magnet variants of rally castle blocks, using Flink's method to save file space ('light').

USE THE SECOND BLOCK MODE ( + Air mode sometimes); Needs to be build over the original block to have the borders

For detailed usage instructions, see Flink's ice block set (https://item.mania.exchange/set/view/11164)

Update 23/05/24: added the diag chicanes from spring 2024 update, and the transition to open dirt added in desert update