Fretsaw,frets and kerf

Hi,i am thinking to buy a new fretsaw.
It is set with spare blades and fretboard templates and will help me very much.
The problem is,the saw i am using now is 0.4mm and i use it with 0.55mm frets.
The fretsaw in the package is 0.6mm kerf.
What kind of fretwire should i use with this one?
0.7mm so the frets will stay in their place?

 

Is a guy who build luthier equipment.
I have buy a fret press from him and its very good quality.
https://www.guitarbuilding.solutions/product-page/fretboard-slotting-jig
I asked him about a scale jig in dimensions details and scale i want,fretsaw and spare blades and they will cost 150£ inclouding shiping.
I bough my current fretsaw a few months ago 30€ and i have only cut 3 fretboards with it.So its brand new.
But if you see the jig in the pics,will work only with his fretsaw.
My point is,since this is a hobby if mine,and i am not getting money from this,i cant spend 2-3000€ for equipmbent.
I have allready spend all of my savings for router,sander,airbrush etc and i dont wan to give 180€ for something that will not work (especialy if you thing that my salary is 600-700€ per month)
I mailed the guy what kind of frets are recomending for this saw,but i would like to know what other luthiers use.
Traditional instrument luthiers here in Greece say that fret wire must be 0.1mm biger than the fretsaw but i dont know if this is an opinion or a must

 

Thanks.What size i am asking for? 0.6 or 0.7?