0.05 is 2 thou,You are talking about 0.02 difference between both of them so that is less than one thou, Guess what after 5,000 km there could easily be that much variance between any new components as they bed in, such a small amount will not be an issue, We are not talking 22,000 RPM Formulae One here where even the five axis machining centres operate as Electric discharge machining so as not to cause stress in machined components from cutting bits.

Mechanic since the seventies and as well an Engine machinist so there will be no issues as long as you buy the collets that match the valves and retainers to suit the same.