Good question when I use it ill.let u know it's sat in the kitchen I'm. Not back in work for a few weeks as I've just had a baby or I mite even get it out and set it up tomorrow and see if there is fine adjustment on it
I did fit some 450x450 tiles similar to that from Topps a few weeks ago(Henley) they had a very narrow 2mm square edge groove cut into them for the grout.
But I had to explain to the customer that because of the rounded edge of the tile and the need for 3mm grout joint I couldn't replicate a 2mm grout joint over the whole floor.
They said that about stick on tiles, tiled wallboards, and tiling on a roll. There's no comparison to the real thing - no chipped corners, lips, shade variation... Why would we want to miss the feel of real tiling.😉