Flying Blue (Air France, KLM, and Other Partners) - Not enough miles to book an award

I am 1500 miles short of being able to book 3 award flights and was wondering if Flying Blue will let me book these flights anyway (taken into account that I am a Platinum member).

I cannot check this online because I need to transfer Membership rewards points to my flying blue account first and I don't want to transfer these points if I am not gonna be able to book the award flights in question...

usually 10% of the needed miles are given as an advance to plat members.

I have done it, not an issue at all. It can be done online (there will be a popup window offering a mileage 'credit').