tile levelling system very thin grout line question - Tile Advice

[what]

I'm considering using a tile levelling system with porcelain tiles 600mm x 300mm on both the walls an floor. The system I intend to use is the tile lash copy type (wedges and plastic clips) however I can only find ones with grout line spacing of 1.5mm,
Is that too thin for floor tiles which I have always spaced at no less then 3mm?
Could I use the levelling system in conjunction with sure tile spacers to provide a wider gap?
Are the pliers needed?

 

[Italy]

I'm considering using a tile levelling system with porcelain tiles 600mm x 300mm on both the walls an floor. The system I intend to use is the tile lash copy type (wedges and plastic clips) however I can only find ones with grout line spacing of 1.5mm,
Is that too thin for floor tiles which I have always spaced at no less then 3mm? Yes
Could I use the levelling system in conjunction with sure tile spacers to provide a wider gap? Yes
Are the pliers needed? Yes

There are also 2 3 4 mm

 

[what]

Thanks:
Where do you get the wider ones?

 

[Italy]

Wait for a response from the pro. I'm just an apprentice.
And use only 1 and 1.5mm

 

[hmtiling]

Use the 1.5 with spacers

 

[Bill]

don't use the lash system as it is probably the worst one on the market.

 

[what]

Thanks
I've decided on Genesis with spacers