Will it void warranty on festool? As saw its designed to cut wood etc.
This is an interesting question to which Festool won't provide a straight answer (it has been asked).
In Germany Festool supply and fully support TS55 and TS65 saws to stonemasonry companies, but in a way that doesn't exist in the UK with no warranty issues.
One of the blades we make is for Bushboard MStone Quartz. Bushboard are supported in their promotion of the TS55 by Festool, but Festool won't confirm in writing that the warranty isn't void. They also won't state that it is void.
We also supply another large company in the UK with segmented blades with which to cut 20mm thick granite using the TS55 (or similar). Again Festool won't commit either way but are happy to support the company probably due to the absolutely vast number of it's customers that own/use Festools. They simply can't risk alienating that many customers.
In short, it's a bit vague but something that Festool are fully aware of.