OKAY now I'm done I think.

code/modules/reagents/chemistry/recipes/medicine.dm

@@ -82,16 +82,16 @@
 	OptimalpHMax 		= 9.5 		// Higest value for above
 	ReactpHLim 			= 2 		// How far out pH wil react, giving impurity place (Exponential phase)
 	CatalystFact 		= 0 		// How much the catalyst affects the reaction (0 = no catalyst)
-	CurveSharpT 		= 2.5 		// How sharp the temperature exponential curve is (to the power of value)
+	CurveSharpT 		= 1 		// How sharp the temperature exponential curve is (to the power of value)
 	CurveSharppH 		= 2.5 		// How sharp the pH exponential curve is (to the power of value)
 	ThermicConstant		= 0.01 		// Temperature change per 1u produced
 	HIonRelease 		= 0.01 		// pH change per 1u reaction (inverse for some reason)
-	RateUpLim 			= 0.02 		// Optimal/max rate possible if all conditions are perfect
+	RateUpLim 			= 0.05 		// Optimal/max rate possible if all conditions are perfect
 	FermiChem 			= TRUE		// If the chemical uses the Fermichem reaction mechanics
 	PurityMin 			= 0
 
 /datum/chemical_reaction/synthtissue/FermiCreate(datum/reagents/holder, added_volume, added_purity)
-	var/datum/reagent/St = holder.has_reagent("synthtissue")
+	var/datum/reagent/synthtissue/St = holder.has_reagent("synthtissue")
 	var/datum/reagent/N = holder.has_reagent("nutriment")
 	if(!St)
 		return
@@ -102,6 +102,8 @@
 		St.volume *= St.purity
 		St.purity = 1
 	N.volume -= 0.002
+	St.grown_volume += added_volume
+	St.data = St.grown_volume
 
 /datum/chemical_reaction/styptic_powder
 	name = "Styptic Powder"

code/modules/surgery/graft_synthtissue.dm

@@ -5,7 +5,7 @@
 /datum/surgery/graft_synthtissue
 	name = "Graft_synthtissue"
 	species = list(/mob/living/carbon/human, /mob/living/carbon/monkey)
-	possible_locs = list(BODY_ZONE_CHEST)
+	possible_locs = list(BODY_ZONE_CHEST, BODY_ZONE_PRECISE_GROIN, BODY_ZONE_PRECISE_EYES)
 	steps = list(
 	/datum/surgery_step/incise,
 	/datum/surgery_step/retract_skin,

code/modules/surgery/organs/organ_internal.dm

@@ -198,7 +198,7 @@
 /mob/living/proc/regenerate_organs()
 	return 0
 
-/mob/living/carbon/regenerate_organs()
+/mob/living/carbon/regenerate_organs(only_one = FALSE)
 	var/breathes = TRUE
 	var/blooded = TRUE
 	if(dna && dna.species)
@@ -217,6 +217,8 @@
 			else
 				LI = new()
 			LI.Insert(src)
+			if(only_one)
+				return
 
 		if(has_stomach && !getorganslot(ORGAN_SLOT_STOMACH))
 			var/obj/item/organ/stomach/S
@@ -226,14 +228,20 @@
 			else
 				S = new()
 			S.Insert(src)
+			if(only_one)
+				return
 
 	if(breathes && !getorganslot(ORGAN_SLOT_LUNGS))
 		var/obj/item/organ/lungs/L = new()
 		L.Insert(src)
+		if(only_one)
+			return
 
 	if(blooded && !getorganslot(ORGAN_SLOT_HEART))
 		var/obj/item/organ/heart/H = new()
 		H.Insert(src)
+		if(only_one)
+			return
 
 	if(!getorganslot(ORGAN_SLOT_TONGUE))
 		var/obj/item/organ/tongue/T
@@ -245,7 +253,10 @@
 
 		// if they have no mutant tongues, give them a regular one
 		T.Insert(src)
-	else
+		if(only_one)
+			return
+
+	else if (!only_one)
 		var/obj/item/organ/tongue/oT = getorganslot(ORGAN_SLOT_TONGUE)
 		if(oT.name == "fluffy tongue")
 			var/obj/item/organ/tongue/T
@@ -266,6 +277,8 @@
 		else
 			E = new()
 		E.Insert(src)
+		if(only_one)
+			return
 
 	if(!getorganslot(ORGAN_SLOT_EARS))
 		var/obj/item/organ/ears/ears
@@ -275,9 +288,13 @@
 			ears = new
 
 		ears.Insert(src)
+		if(only_one)
+			return
 
 	if(!getorganslot(ORGAN_SLOT_TAIL))
 		var/obj/item/organ/tail/tail
 		if(dna && dna.species && dna.species.mutanttail)
 			tail = new dna.species.mutanttail
 			tail.Insert(src)
+			if(only_one)
+				return