RE: Which prop for TT Pro .46/ and other questions
Leave it in. It won't make much diffrence. Mine are a little easier to start with them in.
You will want to change the drawbolt that holds it togeather tho. I use 6-32 threaded rod with a jam and nyloc nut on both ends. I also run a film of JB weld around the joint.
The stock drawbolt will break in a fairly short time.