Help with six cylinder radial engine

Hello, and tthank you for the help and help I have recived on other projects. I am running into a Assembly issue where I can not get the parts to assemble correctly with out the case moving up/down/lift/right, The pistons moving with in the cyclinder but way to far, getting the pistion rod connected right, ect. I understand that it is not close to finlized yet but I need to get the assembly sorta working so I can see what to adjust.

Also, I am in a time crunch since this was a group project with a due date but the other member has done nothing but made a piston. and that Indidual keeps pushing me to do stuff since they know I need it done also and they dont rally care about if its finished (senior project stuff)