Yes first glue all the strips on the outer part half of the biceps let dry 24 hours then you glue in the inner half part but one side at a time, its a 3 step process , 1st glue strips on outer half parts, 2nd glue one side of inner half part, 3rd glue the other side of inner part. I built many and they are flat no gaps ect... Remember when applying glue less is more, if you put too much glue it will take much longer to cure (chemical to evaporate) I just apply a small 3cm strip all along edge towards the inside so when you put part the glue won't sqeeze out all over the place, if done properly glue shouldnt squeeze out and if so very little.