Fitting G1

Custom fitting G1'' - Ø ˜25mm water tube

Added 25.May.2014:

• new shape, new file "iztok_g_g_v01.stl"
• new version of "prirob_01.stl" is file "prirob_g1_v02.stl". Main changes is bigger radius on thread profile and a little bigest clearence.