Well, I went ahead anyway.. and gave it a few mins blast on the grass.. and seemed fine. Did few runs and stopped. Checked the wheel slots and there fine no play being created or starting to warp the slot. Yea I luckly has x2 shims which fit perfectly!.. so thats a added bonus.. so looks like I will be racing tomo after all haha.. thanks guys.. then will sort some new rims ect soon.. but should be ok for the time being fingers crossed!