This set has two versions. One with diagonal bases and the other with square bases. (Picture of a square diagonal is forthcoming, the first one I made didn't come out right, so I'm re-printing it now).
Also, a note: I broke my foot on saturday and I have surgury tomorrow. I may not be able to get a release out this thursday like normal. If I can't, I'll try to get it out later in the week.
Let me know what you think in the comments below, and if you are at the $2/model level, be sure to vote for what you want to see coming next on the OpenForge Trello board. Anyone else can still scan the upcoming ideas and comment. If you should have an account, but don't, message me and I'll get you in.