I think the Simpson hybrid alternative to the HANS device may be preferable in a Strat as it doesn't have the additional height of the shoulder and head "restraint"structure that comes with the HANS variant.I think the Simpson device is what Steve Perez used in his car for full competitive events.
I think not having the rigid frame of the HANS will make entry and exiting of the car easier, especially if you can unclip the helmet straps to do so.
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