I checked my router with dial indicator. It's now holding the cutter at an angle such that there's more runout the further you get from the chuck. I'm not going to try running it like that - clearly not safe.



Ok, I will do. It's still twice the power of my milling machine and I've never run out on that. As you say the router is not as rigid as the milling machine, so I can't see it being able to use more power. I may well lower the gantry to help with the rigidity issues.
I've just looked it up and found that the ER11 collet chuck will only hold up to 7mm diameter. That's not good enough for reasons detailed in the last few posts! I'll have to get the 2.2Kw spindle as it has ER20, so up to 13mm. I can't accept only 7mm since to make wind turbine blades, the main reason I made this router, I will need cutters protruding perhaps 4" from the spindle - unless I use A axis.