ʻO ka puka hoʻoheheʻe pāʻoihana WJW he mea hou ia o ka Puka Kūʻai Kūʻai e hōʻike ana i nā ʻāpana sill hou no ʻelua a me Triple Track a me kekahi mau koho sash hou e hiki ai ke aniani ʻoi aku ka mānoanoa, pālua aniani a me kahi koho glazing ma ka pūnaewele.
ʻO nā hoʻololi nui e pili ana i nā ʻāpana sill hou me ka hāʻule ʻana o nā ala i hiki ke hoʻololi maʻalahi inā ʻino a ʻeha paha a uhi ʻia kā lākou hoʻolālā kū hoʻokahi i nā pahu wai maikaʻi ʻole i nā sills me ka pōmaikaʻi hou o ka hoʻonui ʻana i ka wai. Ke hoʻomau nei ka loaʻa ʻana o nā sill hollow a pau no nā noi i hoʻohana ʻole ʻia kahi subsill.
Loaʻa i kēia manawa nā ʻōpala aʻa i nā ʻano ʻelua a me nā ʻano ʻekolu no nā noi flush sill a ua hoʻohui ʻia kēia mau mea i kahi alumini, a i ʻole nā mea kila kila e hoʻokahe i ka wai o luna.