I have just purchased a 1978 Tahiti. I dont know for sure what model it is although I'm kind of leaning towards an 18' Super Tiger Bubble. The HIN Number is TAH28196M78C. I have the model number at home but I dont recall what it was right now. I have been reading up on these and it seems that Ol' Rigger was associated with Tahiti at one time. If you could would you look at these pics and maybe you can tell me by the HIN what it is.