Doman Mahjong Rules Cheat Sheet

I made a printable cheat sheet for Doman (Riichi) Mahjong, because the rules provided in the set are Japanese and having a reminder on the table for friends who don't know the rules well, or are drunk, is really handy. 

My reason for making it was because I could not find anything like this anywhere on the internet. 

I use this cheat sheet with the Refence sheet from Worldriichi.org, which can be downloaded from their downloads page.

I, myself, printed out 4 copies of both my cheat sheets and the Reference sheet I mentioned above, and put them in the suitcase with the tiles, so I always have it ready to play and anyone could join in without having to know the rules. 

The cheat sheet is not a complete rulebook though and for casual use only. While you can play Doman (Riichi) Mahjong well enough with these rules alone, I could not include all the rules and their intricacies. 

THERE ARE MISSING RULES! besides the two I mention below, I think I am also missing some other rules, but either I didn't think they were very important for casual games with friends or I just missed them. 

I did not want to include FU minipoint rules, as those could cover a page or two by themselves and only apply to low HAN hands. Like, seriously check out the Wikipedia page. The scoring in general is way more complicated than on my sheet anyway.

I also could not include the rules for the season tiles because I could not shorten the rules any further and I didn't want to adjust the letter size and have to readjust my entire document and sacrifice readability (more important than you think) for an optional rule. 
For the sake of anyone reading; the rule is: 

Add 4 extra tiles to the left side of the dead wall. When a season tile is drawn, set it aside and draw from the dead wall (Which now has 8 drawable tiles). This season tile adds 1 extra HAN to your hand if you win the hand.
It is good to note that, during setup, due to the 4 extra tiles you will have to make an adjustment to the walls as they will no longer be 34 tiles each.
Suggestions:
1. Add 1 tile to each wall.
2. Add 4 tiles to 1 wall.
3. Leave 4 tiles in the middle and add to the dead wall afterward

Of course I welcome any feedback on these sheets and feel free to share this page.