 Complete the following phrase:  Although skeleton wasnt initially in the building plan, Sigulda has hosted World Cup races in skeleton since the 2000s. Also, luge competitions are hosted in Sigulda each year, however, the track cant host four-man bobsleigh races, therefore there havent been any World Championship races hosted in Sigulda, although in the 20182019 season a Bobsleigh World Cup stage will take place in Sigulda. Zintis Ekmanis and the original track designers has designed a new layout which would change two curves and make four-man bobsleigh races possible, though some lugers are not happy with this idea, because this may render the track unusable for womens singles and mens doubles lugers. Also, Dainis Dukurs has said in an interview for Sporta Avīze that there was an experiment involving Juris Šics, Andris Šics, Tomass Dukurs and Martins Dukurs, in which the quartet drove with a four-man bobsleigh without crashing. Dukurs stated that this proves that the track is, in fact, suitable for four-man teams, but to make it perfect for bobsleigh, most of the track should be rebuilt. The track will undergo major renovation after 2014 season. Also, an artificial ice start estacade was built in summer of 2008. It would have been used for bobsled, skeleton, and luge events for the 