The case does not require spitting for an inspection post prop strike. The procedures are in the manual and the crank inspection requires special rotax tools that include a protractor for the crank and then you then take each cylinder to TDC and measure the twist between all four. This is carried out due to rotax having pressed together cranks. I can attach the manual pages if you like. Also case fretting is a simple pull tq measurement both cold and hot. Both these inspections don’t take long.