Unfortunately, I bought several Gecko kits before I built their excrementally bad M-76 Otter. I like three wheeled vehicle, so I decided to build their Lambro 550:
60'~70's Vietnam Saigon Shuttle Tricar with The Driver & Passengers. I also have their two Lambro 550 set... sigh.
This kit suffers from tiny parts (one is less than 1mm in the largest dimension!) vague attachment points, vague and misleading instructions and an over-engineered construction, designed to inflict as much irritation as possible. The Gecko designers must have worked at Hobby Boss.
The front cab is designed to make construction as difficult as possible, with a combined front and floor piece, a separate back wall and a separate roof. It would have been simpler and no less accurate to combine the upper cab into one part, with a separate floor. This would make painting and construction easier, but that's not the Gecko way.
I read the instructions carefully and figured that the connection point between the front cab and the cargo section would be where the maximum pain would be inflicted, so I built the main subassemblies:

Part A5, the connecting bar, seems to be the spot where the most pain would be inflicted, right? Small part, tiny contact surfaces where most of the kit's weight would be concentrated - so the most fragile. The cab section connects to a thin crossbar that gets attached to the cabin floor, making it even more fragile:

I figured that I would be smarter than the mofos who designed this kit and I added a 1mm copper wire that goes into holes in both the cab and rear frame. I then attached part A5 in it's spot. Still fragile, but not terrible:

Hey, I'm making progress! No, wrong. Even though the glue was dry and the parts had been reinforced with CA, I noticed that the thin crossbar that holds the connecting bar to the cab was sagging. OK, I put some plastic under it to hold it up.
Next was connecting the engine to the transmission in the rear. Easy? Nope. There was a 3-4mm gap! The engine mount is just wrong and the engine cover barely fits when the engine is where they want you to mount it. I cut the mounts off, glued the engine to the cover in the right spot, then added some sprue to make the connection to the drive shaft.
I'm currently working on the back wall and roof connection and trying to get everything to fit without gaps. I'm sure that the connecting bar will fail with all the handling, so I may whif it by adding support bars from the edges ob the rear framework to the cab.
I started dryfitting the cargo/passenger section and I can tell that it will be a PITA, since a couple of the thin railings broke off.
So much for a quick project....