Apply suggestions from code review

Co-authored-by: Drathek <[email protected]>

code/datums/research_upgrade_datum.dm

@@ -129,8 +129,8 @@
 	value_upgrade = 100 //not useful enough to be expensive
 	clearance_req = 1
 	item_reference = /obj/item/ammo_magazine/flamer_tank/smoke/upgraded
-	change_purchase = 0
-	minimum_price = 0
+	change_purchase = -100
+	minimum_price = 100
 
 /datum/research_upgrades/armor
 	name = "Armor"

code/modules/projectiles/magazines/flamer.dm

@@ -259,8 +259,8 @@
 	max_rounds = 200
 	max_range = 7
 	fuel_pressure = 1
-	max_duration = 100 //if you manage to reach these caps I will be impressed
-	max_intensity = 100
+	max_duration = 50
+	max_intensity = 60
 	custom = TRUE
 
 /obj/item/ammo_magazine/flamer_tank/smoke/upgraded
@@ -269,4 +269,4 @@
 	matter = list("metal" = 50) //no free metal
 	flamer_chem = null
 	custom = TRUE
-	max_rounds = 200
+	max_rounds = 150