I have built the Trumpeter BMD-3 in the past very easy build and every piece glued together perfect no sloppy fit. I expect the same with the BMD-4M no problems. The tracks that come with this kit are very small so take your time cementing them together It is best to use extra thin cement from Tamiya. These kits are the best I've worked with you can't beat Trumpeter. Add these BMDs they go perfect into the model tank and armored vehicle collection.