Hi Benji
I have ridden the 7'4 Hnut and yes it is very stable, my weight is 75 kg's. I have the 7'2 Hypernut at my warehouse.
My main ride is the Naish 8'6 x 28 GTW at 108 litres.
I have tried other smaller boards and find them way too much hard work and counter productive for why I now ride Stand Up.
The H nut is a great way to get the short board ride without sacrificing stability or ease of paddling.
My last 3 surfs have been on the 7'2 x 28 Hypernut and I am having an absolute blast riding this board.
Lost my Stand Up drive a bit of recent after lugging two SUP's around Indonesia and surfing crowded waves.
Revisiting the Hypernut now we are back home and my stoke has returned.
Pics below are the 7'4 on the one day I rode that model a few years back.
Long paddle on loan on the day also.
Take off's on this model are a little different compared to a conventional surf shape stand up, yet when you get this sorted out they become instinctual. Shorter boards will have less glide.
Apologies if you have seen these pics before on this forum.
Regards
Jack

N.B. I am not a Starboard team rider