No reply from IH yet, but it hasn't been 48 hours and I sent the e-mail bank holiday so I'll wait a little longer to hear what they have to say.

Whats the best way to cut the cowl? Index do some cheap tool kit like a dremel, but it doesn't cost £120, I might use that.

Btw the hole on F1 IS there, It was covered in some wood dust thats all.