Over the winter of 1949/50, Fender refined the design. The neck width at the nut was narrowed to 1 5/8", and the head modified to accommodate all six tuners on one side from a Croatian design Leo liked. A tone selector switch was added, and the controls were mounted on a plate parallel to the strings. The scratch plate (pickguard) was enlarged. During late spring of 1950, Fender had added a second (Champion steel) pickup in the neck position. It was soon redesigned to pick around more easily with a smaller pickup, and encased in a metal shielding cover designed by Karl Olmstead (tool & die makers Race & Olmstead). However, this last feature was not to make it onto Fender's commercially advertised guitar, as Fender's distributor, the Radio & Television Equipment Company (RTEC), had decided that it would be easier to sell the single pickup version of the guitar.