Another thing I notice is the lack of threaded rod to keep the mould together. I am not saying it won't work, just an observation.

Cheers falls. All good info.

You need to work out how much deflection you get from each weld, the diagram I drew is just an example, you may need more or less welds to get the desired result. Test it on one length of steel first, do one weld and let it cool completely, measure the deflection, if you need more do more welds unti...

The side you weld will become shorter. Trust me on that one

22mm mdf on top will be too thick in my opinion. I just did the same thing with 16mm mdf and it is borderline too thick. It will average out the profile somewhat due to the fact that it does not want to bend. Oh, yes maybe your right. I've been thinking about how to get the mdf to follow the curve ...

The worst effect I can see assuming you have enough downforce across the entire job is that your bottom mould will no longer be accurate. Go back and read my previous post if you really want to eliminate the problem. I dont understand what yo mean in the first post sorry, my english is not that goo...

22mm mdf on top will be too thick in my opinion. I just did the same thing with 16mm mdf and it is borderline too thick. It will average out the profile somewhat due to the fact that it does not want to bend.

The worst effect I can see assuming you have enough downforce across the entire job is that your bottom mould will no longer be accurate.
Go back and read my previous post if you really want to eliminate the problem.

If the insert is the correct height

The advantages of compound turbo systems are enormous, you will see them come into fashion over the next 10 years I think.
The engine is what is known as ford xr6 turbo 4.0L but I have destroked mine to 3.6L to gain more rpm.
It is only released in Australian built vehicles.

You more need air and fuel. You can turn up the boost until you run the stock fuel system to its limit, at that point you need to upgrade fuel pump and injectors to allow the engine to consume more air. Then you may find the turbo cannot supply enough air so you need to upgrade the turbo. Its pretty...

$30 = bargain.
Try spending hundreds getting it to Australia and no single shop has everything you need.

I like your press!
Can you give details on your layup? It seems you have nothing on top of the core?