ItemInHandLayer perfect item render

hello! i was trying to recreate item-in-hand feature for my custom mob. i figured out that my mob needs a custom iteminhandlayer.
i created it - but the main problem is.. well.. you can see all on screenshots
any idea how i can fix that? is there any implemented method to render the item perfect to hand?

public void render(@NotNull PoseStack pPoseStack, @NotNull MultiBufferSource pBufferSource, int pPackedLight, @NotNull TuneGolemRenderState pRenderState, float pYRot, float pXRot) { 
    ItemStackRenderState item = pRenderState.heldItem; 
    if (!item.isEmpty()) { 
        pPoseStack.pushPose(); 
        ModelPart leftArm = this.getParentModel().leftArm; 
        pPoseStack.translate(0.35,0.5,-1.25); 
        pPoseStack.mulPose(Axis.XP.rotationDegrees(180.0F)); 
        pPoseStack.mulPose(Axis.YP.rotationDegrees(90.0F)); 
        leftArm.translateAndRotate(pPoseStack); 
        // pPoseStack.translate(0,0,0); 
        leftArm.translateAndRotate(pPoseStack);
		if (TuneGolemRenderState.hornPlaying) {
        	pPoseStack.translate(0, -0.5, 0.65); 
          	pPoseStack.scale(1.25F,1.25F,1.25F); 
        } // Minecraft.getInstance().player.displayClientMessage(Component.literal(leftArm.xRot + " " + leftArm.yRot + " " + leftArm.zRot), true); 
      	item.render(pPoseStack, pBufferSource, pPackedLight, OverlayTexture.NO_OVERLAY); 
      	pPoseStack.popPose(); 
      	// -1.0F, -2.0F, -3.0F 
    } 
}