diff --git a/scorch.asm b/scorch.asm
index 7f14758..5e996b7 100644
--- a/scorch.asm
+++ b/scorch.asm
@@ -626,7 +626,7 @@ CheckNextTankAD
 	jsr AutoDefense
 @   dex
     bpl CheckNextTankAD
-	jsr DrawTanks	; redraw tanks witch new defences
+	jsr DrawTanks	; redraw tanks with new defences
 ;
     ldx TankSequencePointer
     lda TankSequence,x
diff --git a/scorch.bin b/scorch.bin
index 09d0da5..4303a3f 100644
Binary files a/scorch.bin and b/scorch.bin differ
diff --git a/scorch.xex b/scorch.xex
index 747dbbf..da4553c 100644
Binary files a/scorch.xex and b/scorch.xex differ
diff --git a/weapons.asm b/weapons.asm
index bb23a23..5a1b936 100644
--- a/weapons.asm
+++ b/weapons.asm
@@ -1506,7 +1506,7 @@ AfterStrongShoot
 	tay	; A=0 !
 	adw xtraj+1 #mountaintable temp
     lda ytraj+1
-    cmp (temp),y	; check collision witch mountains
+    cmp (temp),y	; check collision with mountains
     bcs ShotUnderGround
     jsr Flight
     mva #1 color
@@ -1761,6 +1761,8 @@ LaserNoWalls
 
 	bit TestFlightFlag
 	bmi nowait
+	bit LaserFlag	; faster laser prepare
+	bmi nowait
     lda color
     beq nonowait	; smoke tracer erases slowly
     lda tracerflag	
@@ -1777,7 +1779,7 @@ nowait
 	; If laser fires, edges of the screen finish "flying" and laser hits.
 	lda ytraj+2
 	bmi LaserHitEdge
-	cpw xtraj+1 #screenwidth+1
+	cpw xtraj+1 #screenwidth ;+1
 	bcc LaserNoHitEdge
 LaserHitEdge
     mwa xdraw XHit
@@ -2216,7 +2218,7 @@ MIRVcheckCollision
 
     ldy #0
     lda ytraj+1
-    cmp (temp),y	; check collision witch mountains
+    cmp (temp),y	; check collision with mountains
     bcs mrHit
 
 mrSkipCollisionCheck