What is the official name of the yud in the heh, and tet in the tuf - do we say simply yud ha'heh and tet ha'tuf (assuming tuf is vav with a roof, followed by backward-facing script-tet) ? Also, is there a relation between vav and tet?
The Yud in the Heh - ה
In Hilchot Safrus we consider the ה to be made up of a ד and an upside down י
In סימן לב - סדר כתיבת התפלין sometimes it's called the inside leg of the Heh other times it's called the leg of the Heh
נִקַּב רֶגֶל פְּנִימִי שֶׁל הֵ '' א אֲפִלּוּ לֹא נִשְׁאַר מִמֶּנּוּ אֶלָּא כָּל שֶׁהוּא כָּשֵׁר לְהָרֹא''שׁ
אִם נָגְעוּ רַגְלֵי הַהֵ '' א וְהַקּוֹ''ף בַּגַּג יִגְרֹר הָרֶגֶל וְיַחֲזֹר וְיִכְתְּבֶנּוּ
The Tet in the Tuf - ת
In Hilchot Safrus we consider the ת to be made up of a ר and an upside down ו - but it would be referred to as the left leg of the Tuf. Can't find an easy reference to that now.