Ok, so the thing about the Doctor and the TARDIS.. well, come on.. that show (as much as I adore it) has so many plot holes with so many "convenient" fixes, that it really doesn't matter where or how he travels... it's just good old-fashioned fun. Let it be what it is! Besides, look at the old episodes, before they revamped it with the CG effects - the budget was so low that their main enemy had a whisk and a plunger for weapons.