You definately need to test fit parts before glueing. The main trouble spots are trimming the track links to fit and aligning the front of the turret with the gun. This is my favorite version of the T-34 so it was a labor of love. The turret does fit on the Tamiya body so if you want it used as a conversion you could. The tank has an engine interior also, which I opted not to use and came in handy for my destroyed JS-2 diorama. Considering the PE screen, full accurate interior, decals, wire tow hooks, and cost about the same as a CMK T-34 conversion or Tamiya kit, the Hobby Boss kits are a great deal!