Do you have to round part in heel and spatula?
This is a personal practice that also varies depending on the ski models and / or the quality of the snow. Some do not round, others little and others more and this on different lengths. In general, we avoid rounding skis slalom and personally I do not round in heel even when it comes to longer skis.
For snowboards, it is advisable to round the front of the edge "front side" about 15 cm.