When i initially mount a touring car body , I'd minimized the distance btween the foam bumper and body [ in an effort to lessen cracks at the wheel well.]With this said , i was also mindful of how i cut out the wheelwell(s)- a smooth cut versus a jagged edge lends the body to be less prone to initializing a crack. Reinforced packaging tape can be used if it'll adhere to the [painted] body.Good luck.
Rc 10L (x6)
(.......in 2010, I jus' may get to run one.)-Irrgang Racing Service;TeamCRP. R.I.P. Billy 105