The strips conform easier to bending in toward the stern and bow. It is the upward sweep to achieve the rocker in the bow and stern where the heat gun will reduce the amount of force needed to hold it in place against the previous strip. I like to reduce this stress by tapering the strips and heat. You should be able to glue the strip without excessive force. I think that you can force the strips to snug up with too much force but when you release the hull from the forms the built in stress has a nasty habit of resolving the internal stress by deforming. This is my way of saying you can force them together and let the glue dry over night but sooner or later it will bite back.