diff --git a/byond-extools.dll b/byond-extools.dll
index a83ea1e543..7c45514fe2 100644
Binary files a/byond-extools.dll and b/byond-extools.dll differ
diff --git a/code/__DEFINES/atmospherics.dm b/code/__DEFINES/atmospherics.dm
index 881f8d064b..c609bdd230 100644
--- a/code/__DEFINES/atmospherics.dm
+++ b/code/__DEFINES/atmospherics.dm
@@ -284,8 +284,9 @@ GLOBAL_LIST_INIT(atmos_adjacent_savings, list(0,0))
 GLOBAL_VAR(atmos_extools_initialized) // this must be an uninitialized (null) one or init_fastmos will be called twice because reasons
 #define ATMOS_EXTOOLS_CHECK if(!GLOB.atmos_extools_initialized){\
 	GLOB.atmos_extools_initialized=TRUE;\
-	if(fexists(world.system_type == MS_WINDOWS ? "byond-extools.dll" : "libbyond-extools.so")){\
-		var/result = call((world.system_type == MS_WINDOWS ? "byond-extools.dll" : "libbyond-extools.so"),"init_fastmos")();\
+	var/extools = world.GetConfig("env", "EXTOOLS_DLL") || "./byond-extools.dll";\
+	if(fexists(extools)){\
+		var/result = call(extools,"init_fastmos")();\
 		if(result != "ok") {CRASH(result);}\
 	} else {\
 		CRASH("byond-extools.dll does not exist!");\
diff --git a/code/modules/atmospherics/gasmixtures/gas_mixture.dm b/code/modules/atmospherics/gasmixtures/gas_mixture.dm
index 7993599a13..64e03cbd88 100644
--- a/code/modules/atmospherics/gasmixtures/gas_mixture.dm
+++ b/code/modules/atmospherics/gasmixtures/gas_mixture.dm
@@ -172,9 +172,12 @@ GLOBAL_LIST_INIT(meta_gas_fusions, meta_gas_fusion_list())
 	
 /datum/gas_mixture/react(datum/holder)
 	. = NO_REACTION
+	if(!total_moles())
+		return
 	var/list/reactions = list()
-	for(var/I in get_gases())
-		reactions += SSair.gas_reactions[I]
+	for(var/datum/gas_reaction/G in SSair.gas_reactions)
+		if(get_moles(G.major_gas))
+			reactions += G
 	if(!length(reactions))
 		return
 	reaction_results = new
@@ -195,9 +198,22 @@ GLOBAL_LIST_INIT(meta_gas_fusions, meta_gas_fusion_list())
 					continue
 				if(get_moles(id) < min_reqs[id])
 					continue reaction_loop
+			//at this point, all minimum requirements for the reaction are satisfied.
 
+			/*	currently no reactions have maximum requirements, so we can leave the checks commented out for a slight performance boost
+				PLEASE DO NOT REMOVE THIS CODE. the commenting is here only for a performance increase.
+				enabling these checks should be as easy as possible and the fact that they are disabled should be as clear as possible
+			var/list/max_reqs = reaction.max_requirements
+			if((max_reqs["TEMP"] && temp > max_reqs["TEMP"]) \
+			|| (max_reqs["ENER"] && ener > max_reqs["ENER"]))
+				continue
+			for(var/id in max_reqs)
+				if(id == "TEMP" || id == "ENER")
+					continue
+				if(cached_gases[id] && cached_gases[id][MOLES] > max_reqs[id])
+					continue reaction_loop
 			//at this point, all requirements for the reaction are satisfied. we can now react()
-
+			*/
 			. |= reaction.react(src, holder)
 			if (. & STOP_REACTIONS)
 				break
diff --git a/code/modules/atmospherics/machinery/components/components_base.dm b/code/modules/atmospherics/machinery/components/components_base.dm
index 6f7d92c719..bcf2e6f134 100644
--- a/code/modules/atmospherics/machinery/components/components_base.dm
+++ b/code/modules/atmospherics/machinery/components/components_base.dm
@@ -15,8 +15,7 @@
 	..()
 
 	for(var/i in 1 to device_type)
-		var/datum/gas_mixture/A = new
-		A.set_volume(200)
+		var/datum/gas_mixture/A = new(200)
 		airs[i] = A
 
 // Iconnery
diff --git a/code/modules/atmospherics/machinery/portable/portable_atmospherics.dm b/code/modules/atmospherics/machinery/portable/portable_atmospherics.dm
index 6ae032fae2..81a0e0bc40 100644
--- a/code/modules/atmospherics/machinery/portable/portable_atmospherics.dm
+++ b/code/modules/atmospherics/machinery/portable/portable_atmospherics.dm
@@ -18,8 +18,7 @@
 	..()
 	SSair.atmos_machinery += src
 
-	air_contents = new
-	air_contents.set_volume(volume)
+	air_contents = new(volume)
 	air_contents.set_temperature(T20C)
 
 	return 1