RE: What to do with wheels and sidepanels?
Nothing at all wrong with your Tiger as you have it. Weathering is nice and the tow cables look very used, although they didn't always go back on the stowage locations "parade ready". Mud is always present on any tank, so if you want to to add some realism, you can always add boot "scuff" marks where the crew would be entering-exiting; around the front, turret sides, on spare track teeth etc. and places always used for a foot hold. Dry-brush some scratches along the sides...(almost no paint) to show that the tank has bullied its way through heavy underbrush. Looking good.