Belt

It's one of the more complex parts of the uniform because it comes as 3 elements: the belt itself, the thigh boxes, the thermal detonator. I suggest you take your time while making it and make sure it fits your hip line and not your waist (if you're female this is important).

You will need a drilling tool (DREMEL or power drill), rivets, rivet gun, rivet washers, sewing needle, thread, etc. Heat-shaping is not necessary but can help if you're really small.

Cutting holes for the thigh box webbing. That's the X-acto knife. I helped myself with my power drill to make a first dent into it. ABS is hard to cut through when it's in an edge or curb. Mind your fingers.

The belt is in one piece in the movie but SC makes it in 3 pieces so we have to stick them together... Some people use glue to avoid using rivets but I would have none of that. Rivets all the way because I suspect a lack of brain cells in the practicality department. Make sure you secure the rivet heads/nibs with foam or cloth to protect your suit.

The thermal detonator, assembled as instructed using glue and zip ties.

It's not completed with it's black greeblies (3 squares and a circle) because I accidentally damaged it with my heatgun, trying to widen the middle strip. Again, brain cell failure. Don't try to heat-shape this piece.

Update: after contacting SC they kindly sent me a new piece of ABS casing, so I eventually was able to redo this part.

Two elements done, now for the thigh boxes.

SC provides you with synthetic white webbing but for screen accuracy (and the Lancer status) you need cotton webbing. It can be white or off-white.

I used the synthetic webbing but replaced it with cotton a week later. I just grabbed an old kimono belt from my Jujitsu days, washed it and got this nice piece of Lancer-material webbing. Recycling is your friend. We scouts love nature, remember that.

To secure your thigh box straps you may want to make something like this, it's velcro, or have pins inside your boxes to adjust the length of your straps. They need to sit rather high on your thighs but I like them just a little lower for comfort.