I am about to buy a 17" new old stock standard alloy from a Honda dealer on eBay so I can have a full sized spare in my CR-V. This is because I tow a caravan and the bible states the space saver is not suitable for towing. It will fit in the wheel well after removing the padding blocks from the back of the cover, but what do I do about the TPMS? Is there a sender in each wheel, and will I have to get one fitted to the spare? Never had these hi tec gizmos before so I am a bit baffled. Ta, Pete C.