RM vs RF on stock

Hi everyone, I was after an opinion regarding licence choice on stock.

I have contracts with two exclusive agencies, one of which is one of the 'main' ones, and non exclusive contracts with AGE, Alamy, Superstock etc. I submit RM only (I like to retain control) to all but the 'main' agency, who choses the licence type themselves. There are some pretty unusual images, especially from the Arctic which are unrepeatable, which have been tagged as RF by this big agency and I have little leverage.

My question is, would you take the 'hit' and accept RF with one big agency or be brave and keep it as RM with the multiple smaller ones?

Thanks, hope that's clear!

Alex.

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http://www.alexhibbert.com