When I vote for an evaluation by locking in my wings.... the ICO ends... when can I withdraw my wings and still be eligible to receive rewards? Do i have to wait until the ICO has ended... Can it then withdraw my wings and still get the payment?
You can basically withdraw your locked Wings after the forecasting period is over, which you can track on an "Info" tab of a project under Project reward information.
Then, of course, you have to wait until ICO ends, because that's what you actually do, forecast how much funds this ICO will get.
After it ends, wait for the information on twitter or wings official telegram chat you can get your reward, then go to the project's "Valuation & Feedback" tab and claim it.