Here are two issues he raised about my 2nd Mezuza:
- In the word Deganecha, the Gimel's right leg doesn't comes lower than the left side ("gimel's yud") - both legs are leveled and that's not optimal. Solution: Make the right leg bigger and there's no problem of Kesidran (Mezuza cannot be fixed after it's finished) because this is not a fix, only a hiddur.
- In the word Besadecha, the lamed in the next line is coming inside the Daled slightly. There's a potential issue with that because the Daled could look like a Hey, as the only difference between these two letter (Daled and Hey) is the little dot in the bottom-left side. Solution: This is not a major problem since what's coming inside the Daled is not the actual Lamed but the Lamed's Tag, therefore it's fixable. There are tow possible solutions: either make the Daled's leg a bit shorter, so the Tag of Lamed will not be inside of the Daled; or erase a bit of the Lamed's Tag - i.e. make it smaller. The latter solution is preferable since it's always better to touch a tag instead of the actual letter. (note the small Tag in the Beit next to the Lamed - I did that to avoid having the Tag coming into the Chaf)