HI - I've got another question about gluing instructions for this same kit. I'm getting ready to clue B37 to B38. When I test fit with the front uprights in between the front uprights are loose - they aren't squeezed tight between B37 and B38. Does anyone know if that is by design? Or should I also glue the front uprights to the covers? Yes, I know my progress is very slow, but I've had some hand and shoulder issues the last few months that has slowed this kind of stuff down.) Thanks!! Jeff