[QUOTE=Howard Wood;48227]1.

2. Lets look at the available options and costs and the possibility of a control tyre. For example the F5000 class have a control tyre AND a limit of one set of tyre per two meetings.

F5000 do not have a control tyre, but there is really only one compound in the Avon range that suits the majority
of the competitors, therefore everyone uses it. I believe F Atlantic may have a control Avon compound