So a few years back I made up several mould tools using Uni-Mould and the intention to use the Easy-Preg and Vari-Preg products as at the time it was the standard choice for Out of Autoclave.
Now that a few years have passed and things have moved to the new X-Preg System which I notice is not compatible with the Uni-Mould system, Do I now have a load of mould tools that I cannot use or is there a way for me to still use these moulds with the X-Preg system?

 I'll be a little annoyed if all the money invested in making these moulds goes to waste. Obviously now any future moulds I make will use X-Preg Tooling

The moulds will still work just fine. Easy Composites official stand point on it is that vinyl tooling causes pinholing with the X-Preg system. I've done extensive testing with this, and I've found I get exactly the same results with vinyl tooling as I do with epoxy tooling, but the vinyl tooling seems to start to suffer a little bit earlier, ill only get 10 or 15 pulls before release becomes a bit harder (still ok, but no longer falling out of the mould) and little bits of gelcoat start to come off. With regards to the X-Preg component quality - exactly the same with epoxy and vinyl tooling.

I have found a much longer post-cure on the tooling before putting it into service helps. I'll do a regular post-cure cycle, but then do an extended soak at 90° for minimum 24 hours.