move this..

code/__HELPERS/custom_holoforms.dm

@@ -16,7 +16,7 @@
 	if(length(inhand_equipment))
 		for(var/path in inhand_equipment)
 			var/obj/item/I = new path
-			mannequin.equip_to_slot_if_possible(I, SLOT_IN_HANDS, TRUE, TRUE, TRUE, TRUE)
+			mannequin.equip_to_slot_if_possible(I, SLOT_HANDS, TRUE, TRUE, TRUE, TRUE)
 	var/icon/result = getFlatIcon(mannequin)
 	unset_busy_human_dummy(DUMMY_HUMAN_SLOT_HOLOFORM)
 	return result

code/modules/mob/living/silicon/pai/pai_shell.dm

@@ -91,20 +91,13 @@
 	..()
 	update_resting_icon(resting)
 
-/mob/living/silicon/pai/proc/update_icon()
-	if((chassis == "custom") && !custom_holoform_icon)
-		chassis = pick(possible_chassis - "custom")
-	if(chassis != "custom")
-		icon_state = "[chassis]_[resting]"
-	else
-		icon = custom_holoform_icon
-		icon_state = ""
-	update_transform()
-
 /mob/living/silicon/pai/proc/update_resting_icon(rest)
 	if(chassis == "custom")
+		lying_prev = lying
 		if(resting)
 			lying = pick(90, 270)
+		else
+			lying = 0
 	else
 		lying = 0
 	update_icon()

code/modules/mob/living/silicon/pai/update_icon.dm

@@ -0,0 +1,26 @@
+/mob/living/silicon/pai/proc/update_icon()
+	if((chassis == "custom") && !custom_holoform_icon)
+		chassis = pick(possible_chassis - "custom")
+	if(chassis != "custom")
+		icon_state = "[chassis]_[resting]"
+	else
+		icon = custom_holoform_icon
+		icon_state = ""
+	update_transform()
+
+//Might be a copypaste from /mob/living/carbon/update_transform(), is it time to pull the combined code to /living yet? didn't want edge cases.
+/mob/living/silicon/pai/update_transform()
+	var/matrix/ntransform = matrix(transform)
+	var/final_pixel_y = pixel_y
+	var/final_dir = dir
+	if(lying != lying_prev)
+		ntransform.TurnTo(lying_prev, lying)
+		if(!lying)		//standing
+			final_pixel_y = get_standard_pixel_y_offset()
+		else
+			if(!lying_prev)
+				pixel_y = get_standard_pixel_y_offset()
+				final_pixel_y = get_standard_pixel_y_offset(lying)
+				if(dir & (EAST|WEST))
+					final_dir = pick(NORTH, SOUTH)
+		animate(src, transform = ntransform, time = 2, pixel_y = final_pixel_y, dir = final_dir, easing = EASE_IN | EASE_OUT)

tgstation.dme

@@ -2183,6 +2183,7 @@
 #include "code\modules\mob\living\silicon\pai\personality.dm"
 #include "code\modules\mob\living\silicon\pai\say.dm"
 #include "code\modules\mob\living\silicon\pai\software.dm"
+#include "code\modules\mob\living\silicon\pai\update_icon.dm"
 #include "code\modules\mob\living\silicon\robot\death.dm"
 #include "code\modules\mob\living\silicon\robot\emote.dm"
 #include "code\modules\mob\living\silicon\robot\examine.dm"