If the prop won't stay on, it's damaged. Chances are if you CA it on, it will not be on straight and viberate very badly. Spend the $5.00 and get a new prop. Don't make the learning curve any harder than need be by trying to fly something that has repairable issues. Extreme vibration will cause issues. It can even cause control issues that many construe as radio glitches. It can also cause your motor mount to loosen, which is already a known issue on the Stryker B.....Good Luck......Pat