1. The body size should be at least three times the size of humans when adult, so the second line. Ignore everything else.
2. Set the [DEFAULT_RELSIZE] to 200 maybe?
3. Add a [GRASP] tag to the tail raws
[BODY:TAIL]
[BP:TAIL:tail:STP]
[CONTYPE:LOWERBODY]
[CATEGORY:TAIL]
[DEFAULT_RELSIZE:100]
4. Use this body tag. I used it for Gilgamesh and it should work.
[BODY:HUMANOID_6ARMS]
[BP:UB:upper body:upper bodies][UPPERBODY][CATEGORY:BODY_UPPER]
[DEFAULT_RELSIZE:1000]
[BP:LB:lower body:lower bodies][CON:UB][LOWERBODY][CATEGORY:BODY_LOWER]
[DEFAULT_RELSIZE:1000]
[BP:HD:head:STP][CON:UB][HEAD][CATEGORY:HEAD]
[DEFAULT_RELSIZE:300]
[BP:RUA1:first right upper arm:STP][CON:UB][LIMB][RIGHT][CATEGORY:ARM_UPPER]
[DEFAULT_RELSIZE:200]
[BP:LUA1:first left upper arm:STP][CON:UB][LIMB][LEFT][CATEGORY:ARM_UPPER]
[DEFAULT_RELSIZE:200]
[BP:RLA1:first right lower arm:STP][CON:RUA1][LIMB][RIGHT][CATEGORY:ARM_LOWER]
[DEFAULT_RELSIZE:200]
[BP:LLA1:first left lower arm:STP][CON:LUA1][LIMB][LEFT][CATEGORY:ARM_LOWER]
[DEFAULT_RELSIZE:200]
[BP:RH1:first right hand:STP][CON:RLA1][GRASP][RIGHT][CATEGORY:HAND]
[DEFAULT_RELSIZE:80]
[BP:LH1:first left hand:STP][CON:LLA1][GRASP][LEFT][CATEGORY:HAND]
[DEFAULT_RELSIZE:80]
[BP:RUA2:second right upper arm:STP][CON:UB][LIMB][RIGHT][CATEGORY:ARM_UPPER]
[DEFAULT_RELSIZE:200]
[BP:LUA2:second left upper arm:STP][CON:UB][LIMB][LEFT][CATEGORY:ARM_UPPER]
[DEFAULT_RELSIZE:200]
[BP:RLA2:second right lower arm:STP][CON:RUA2][LIMB][RIGHT][CATEGORY:ARM_LOWER]
[DEFAULT_RELSIZE:200]
[BP:LLA2:second left lower arm:STP][CON:LUA2][LIMB][LEFT][CATEGORY:ARM_LOWER]
[DEFAULT_RELSIZE:200]
[BP:RH2:second right hand:STP][CON:RLA2][GRASP][RIGHT][CATEGORY:HAND]
[DEFAULT_RELSIZE:80]
[BP:LH2:second left hand:STP][CON:LLA2][GRASP][LEFT][CATEGORY:HAND]
[DEFAULT_RELSIZE:80]
[BP:RUA3:third right upper arm:STP][CON:UB][LIMB][RIGHT][CATEGORY:ARM_UPPER]
[DEFAULT_RELSIZE:200]
[BP:LUA3:third left upper arm:STP][CON:UB][LIMB][LEFT][CATEGORY:ARM_UPPER]
[DEFAULT_RELSIZE:200]
[BP:RLA3:third right lower arm:STP][CON:RUA3][LIMB][RIGHT][CATEGORY:ARM_LOWER]
[DEFAULT_RELSIZE:200]
[BP:LLA3:third left lower arm:STP][CON:LUA3][LIMB][LEFT][CATEGORY:ARM_LOWER]
[DEFAULT_RELSIZE:200]
[BP:RH3:third right hand:STP][CON:RLA3][GRASP][RIGHT][CATEGORY:HAND]
[DEFAULT_RELSIZE:80]
[BP:LH3:third left hand:STP][CON:LLA3][GRASP][LEFT][CATEGORY:HAND]
[DEFAULT_RELSIZE:80]
[BP:RUL:right upper leg:STP][CON:LB][LIMB][RIGHT][CATEGORY:LEG_UPPER]
[DEFAULT_RELSIZE:500]
[BP:LUL:left upper leg:STP][CON:LB][LIMB][LEFT][CATEGORY:LEG_UPPER]
[DEFAULT_RELSIZE:500]
[BP:RLL:right lower leg:STP][CON:RUL][LIMB][RIGHT][CATEGORY:LEG_LOWER]
[DEFAULT_RELSIZE:400]
[BP:LLL:left lower leg:STP][CON:LUL][LIMB][LEFT][CATEGORY:LEG_LOWER]
[DEFAULT_RELSIZE:400]
[BP:RF:right foot:right feet][CON:RLL][STANCE][RIGHT][CATEGORY:FOOT]
[DEFAULT_RELSIZE:120]
[BP:LF:left foot:left feet][CON:LLL][STANCE][LEFT][CATEGORY:FOOT]
[DEFAULT_RELSIZE:120]
5. Removing
[GETS_WOUND_INFECTIONS]
[GETS_INFECTIONS_FROM_ROT]
is pretty much the only way to do that.