Apologies, if you thought that I doubted you, I am just surprised at the oversight from Festool's engineers.
The extensions are expensive, so having to get another set, to do exactly the same thing, is asking a lot.
The fact that the adapter is made to fit on the existing cart, would it not have made more sense to allow the same extensions.
Imagine that you have both models of the saws set up on their carts and you inadvertently put the wrong extensions on each saw, you are going to make a lot of mistakes before you realise the error. I know they have a label on the top, but when you're setting up on site, usually in a hurry, that could easily be missed.
You shouldn't have to second guess the scale, and calculate each time you need to make a cut. That is why we pay so much more for Festool products, they should be right from the start.
Phil, thanks for the reply regarding the lack of a cordless variant anytime soon.
Once again, Festool are behind the market trend, when it comes to releasing new products.