Recently bought a used 912ULS that had a prop strike (cracked but not broken off blades). Flange checked ok with a dial indicator. Having read a thread that there should be some internal clearances that allow the prop flange to move in/out and rotationally a little. With some effort the prop flange can be rotated, but there is no free play at all. The engine has the newer case, so I cannot just sent the gearbox in for an inspection. Any ideas?