Ngokusika ibhasikidi yokuncedisa igesi inokuqonda kakuhle inkqubo yokuncedisa umoya, xa ibhasikidi inqunyulwe, unokubona ukuba ngaphakathi kungenanto kwaye ayiqinile.
Inzuzo ye-hollow kukunciphisa uphawu lwe-shrinkage, ibhasikidi ayilula ukuguqulwa, kwaye inokunciphisa ubunzima bebhaskithi ngokwayo ngelixa iqinisekisa amandla enkxaso yesakhiwo sebhasikithi ngokwayo.