We jacked up the IP base by 8mm. Though the trgaet was 12mm, the piston head was too high to insert a spanner. As shown in the table, maximum range of FRs is +/-11.5mm. To compensate the present TM height (-19.5mm), it is necessary to use all of range. It is not safe. The present upper limit of F0 keystone is due to the additional FR jig. So we will try to modify the jig.