In op-03 special tool, shank dia20 ,relief of 16 mm T-Slot cutter used for finishing the inner wall|The required relief was 32mm min to finish the inner wall ,but the tool has 20 mm|T-Slot cutter with 20mm relief  used to finish the inner wall instead of 32mm relief |due to less relief in the tool ,the shank of the tool rubbed on the part surface 