I do not have one of these hulls, but I have an 8255 moulded hull that is 10% smaller as it was originally designed as a sport 45 setup. I run mine as a Q sport hydro and have a TP 4060 1620 kv on 6s1P turning a prather 230. I find that if the strut is too high then it gets a lot of air under it even with an air dam, also as I am not constrained by rules on this my strut is mounted on the transom.
You can try dropping the strut further until it settles down, even the other day my boat was running quite flighty and an adjustment of around 1mm settled it down nicely. Speed wise it is around the 110 + kph and with good driving can hold it's own against petrol sport hydros and a 90 twin rigger. CG is through the center of the turn fin which the placement is pretty much the same as yours. You could try a prop with some more lift, or perhaps prather 235, 240.
The offset weight is not a problem for racing ovals and my prop is offset further than yours, I would have to measure it but I think it was around 3/4". I run my rudder on the right, but that is just my preference.
All I can suggest you can try here is strut adjustments and prop changes untill you find the sweet spot. Sorry if I cannot be any more help than that.
NZMPBA 2013, 2016 Open Electric Champion. NZMPBA 2016 P Offshore Champion.
2016 SUHA Q Sport Hydro Hi Points Champion.
BOPMPBC Open Mono, Open Electric Champion.
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