I talked to Daryl at Spring Brake Thingy about a parking brake for ace. He said he needs a donor ace to build one. He is in Homeland,CA if anybody lives near him. I don't have a ace yet to let him use. I plan on purchasing one in the future. My 2009 Polaris RZR S 800 has a after market parking brake. I cannot park on hill without using it or it will not go into gear from park. I have read some of you have same issues with ace. I think a parking brake will help. His Phone number is 951-663-1205.