gearbox help please

[whitenovasaloon]

hi,
got a corsa gsi box at the weekend so i can put the close ratio gears into my F10. I already have a 4.1 CWP in the F10 and so need to swap the pinion onto the F15 mainshaft, but it doesnt look like the pinion on the F15 is removable like on the f10, can anyone help with this please
thanks

[garyc]

You need a nova CR cluster or a corsa CR one from a F13 box. I think u have shot it.

[mowgli]

is it a 1.0?

[whitenovasaloon]

was a 1.0, now its a 1.4 8v.