Ninja grass blade install

I recently purchased a Ninja grass blade for my MotorGuide Xi5 trolling motor. However there is not enough clearance between the propeller to install it as instructed. The only option I can think of is to add some type of spacer before the propeller to move it out a little bit to give it the correct clearance. However, I am not familiar enough with trolling motors to know if this may cause any issues or not. I have read that some have changed the propeller to a Machette III or others which seems to work, but I would rather not do this at this point if there are other options. I appreciate any help anyone can offer.