This and the fact that the rails don't seem to be perfectly flat makes me wonder if I shouldn't be swapping it for something else. How big a deal is 0.2mm increased kerf?
The MacAllister (formerly Titan) is basically the same as the Erbauer but 165mm, for which better blades are easily obtained. Having said that I have found the supplied blade to be excellent, and it's had a fair bit of use.
Yes, sounds like not worth changing the blade size.
Just taken delivery of an Erbauer which comes with a 185mm, 48t, 2.2mm kerf and 20mm fixing bore. Problem is I now realise that Screwfix, and no one else, seems to sell the exact replacement blade. This is the closest I can find - https://www.amazon.co.uk/TCT18580T-Saxton-Circular-Makita-Dewalt/dp/B01MSZEX56/ref=pd_rhf_gw_p_img_4?_encoding=UTF8&psc=1&refRID=QM34AV0FX0ZF88DACBCC
This and the fact that the rails don't seem to be perfectly flat makes me wonder if I shouldn't be swapping it for something else. How big a deal is 0.2mm increased kerf?