Not quite right. I think that now the wonderful JAR is with us you can upgrade just by having 100hrs + of instructing and have 25 supervised solos. I think you also need a recommendation from your CFI.
You talk however about AFI to QFI. These were the old CAA terms, and you MIGHT have to ask them about upgrading. If it's any help, I did my AFI course under the old scheme and was issued with a CAA AFI rating. However I sent them the details as required by JAA and they sent me an unrestricted FI rating.
Any help?
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"Take-off is optional, Landing is mandatory"