avgwhtboy,my upper and lower matched up well,i wish i would of used the 30 minute epoxy here to allow for more alignment time,ill do it next build for sure just the learning process,i didnt have to cut my slot any on the bottom,thats for one of the formers that goes in there and made was just fine,just watch out when u glue in f5 that you dont get glue in the holes like i did,not fun,so good luck this ought be fun we are close on the same plane