Roy, there are differing thoughts on tube pressures, some like them hard, me I prefer them to deform slightly with an open palm. Remember that changes in air temperature will have a dramatic effect on the pressure in the tube. So don't blow them up hard early morning or in the evening during the summer or you risk damaging them during the heat of the day. Equally they will go soggy during the winter if they haven't been pumped up since the summer. What the temperature under a cover too, dark coloured covers really heat up the boat inside.
You won't go far wrong if you can deform the tubes slightly by hand.
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