All of my LCG style TVPs come with an engine plate and center skid. The TVPs are 7075 aluminum and the skid and engine plate are 6061. The use of 7075 is what makes them so damn strong, plus they are designed with bashing in mind. Everyone tends to compare my plates to the FLM offerings because the prices are close, but the aluminum that I use is 3-4X the price of their stuff...
I'm currently out of stock though, so it will be up to two weeks or so before I can make any more. I've been looking for some .090 material to do the engine plates to go with my current orders for two weeks now (I JUST located some of that) , and my new sheet of TVP material won't come in for at least another week. I don't know if it's because of the war or what, but my steel suppliers had a hell of a time finding a sheet of that 7075...
Here's a pic of the newest setup I have done... it's the same thing as my normal 10mm extended LCGs with some added bling factor.