Gary, the straighter the build the better the plane will fly. Small twists and bends in a trainer won't make it fly better but most the time you won't notice. It's a good habit to build as straight and true as you can. Most twists and bends can be trimmed out in flight with your radio. I have seen planes with more twists in them then a snake and still fly well enough. Next time the boys will do better and the third one will be even better then the second one.
CA glue seems to be the same no mater what name it is sold under. I buy a three tube pack at the dollar store and keep a tube in my flight box. I buy it in 8 ounce bottles at a wood workers supply store or at one of the local hobby shops. I use a lot of thin and medium. The thicker it is the longer the cure time. If there is any foam in the plane then keep the CA away from it unless you buy the foam safe CA, normal CA will eat the foam as quick as acetone.
You can also use any of the normal old wood glues. Tite Bond is a good one. CA can give you a cold like symptom if used too often in an enclosed area. Wood glue gives you a lot longer working time also.