Why is Custom Shroom only 1-5 when most Mario Party games that have this item (e.g. Sluggish Shroom or Custom Dice) are 1-10? It's not like it would be any more OP than the Triple Dice or Plus 10 Card.
I'm not gonna lie, I didn't even know that it worked that way. XD
Well in that case, why not just make it so you can't get coins by using Double/Triple Dice and Custom Dice at the same time?
Also given that one of the events that can occur during the last five turns is turning all Red Spaces into Chance Time Spaces, I don't think making it easier to get Chance Time should be an issue.