Hi James,
The Thunder Tiger Voyager II has the same hull as the ETNZ, which has the keelfin too far forward, it also is equipped with the worst set of sails ever, if you look at the material used, it shrinks exessively in warm dry conditions and sags in damp cold conditions.
In order to perform well, it needs some TLC.
The 'original' TT Voyager has an ABS hull and is shaped like the Australia II, an AAC boat from the eighties.
It came with the same dreadful sailmaterial as it's 'successor' and also needed some TLC to perform well.
I own an ABS Voyager well modded and enjoy sailing it every time.
I also have a gutted ETNZ hull which I'm in the process of converting into a well sailing model.
Like all boats in this price frame, they do sail reasonably well out of the box, but durability and real performance on the water comes from alterations made to the rig.
Regards, Jan.