European Metals Holdings Ltd (ASX:EMH, LON:EMH) is making good progress on a pre-feasibility study (PFS) on the Cinovec Lithium-Tin Project in the Czech Republic.A earlier scoping study found the Cinovec deposit could be amenable to bulk underground mining. It also revealed a potential production cost of about $1,500 per tonne of lithium carbonate excluding tin and tungsten credits.The major focus of the PFS has been on decreasing required capital and maximising cashflow in the first 5 years of the mine life. A re-design of the mining process looks to be paying dividends and likely show a positive impact on the financial model of the project.