no difference Moon 
Thank you for this great calculator.
According to that, with Titanium wire grade 1 0.18mm building the coil with 2.5 dimeter or 2.7 (as I read it's perfect fit for Tilemahos springomiser) .
Yes. the original spring has an external diameter of 3.6mm. See: Springomizer - GG WikiAre you saying that outher diameter for a spring to fit into channel is 3.6mm?
Does anyone know Europe base store where I can find 0,2mm Ti Grade 1 wire and 0,25 SS 316L wire? I found few of them but I would like a recommendation for a store that really sell what they say it is.