I've looked at these, not to buy as I'm happy with what I have but just to see what they use for construction. They are made of 20 gauge steel with castings( I'm guessing) for other parts such as tracks wheels and sprockets. 20 gauge steel is about 40 thousandths of an inch
or about 1mm. On the surface that seems thin but steel properly prepared of course is very strong. The closest comparison I have are my Sankyo models- a 1/10 scale type 74 and 1/8 type 61- these use about the same thickness of steel for the upper and lower hull. The type 74 weighs about 60 pounds and the 61 about 115 pounds. They've held up well but you need to take precautions when handling or working with steel. Damaged -bent steel is difficult to straighten without heating and heating can cause warping if not done carefully. Benefits of steel is you can braze accessories or attachments to it very readily with little specialty equipment; if you can use a TIG or MIG welder so much the better.

The company seems to improve their products periodically and they've been around for some time( unless I'm mistaken) and I hear their products are popular so you'll probably not want for 'how-to' aid and advice. They seem a viable alternative to the expensive Armortek ( and I know a number of purists who have bones to pick with Armortek) and certainly those fiberglass things from Russia. The only other one I'd consider, if I was in the market is Metalbox- but I'd check into customer feed back, I assume they're still around.

I'd say go for it.

Jerry