i agree, 4 is better, but due to the fact that you moved uke a bit to get a dismember, i would deduct 1 or 2 from the replay, started from an 8, now its a 6 or 7 :/
the only reason i want it to be done is because the grip may be partially the cause of the arm coming off, if its not, im sorry i wasted your time, if it is, then... well yeah