Interesting. You could have one house with 33-past-the-post and one with proportional representation, though I guess the difference would be more meaningful if

Interesting. You could have one house with 33-past-the-post and one with proportional representation, though I guess the difference would be more meaningful if it was less than 33. Another thing that would be interesting would be choosing the government by first-past-the-post and the parliament by proportional representation, preferably in the same election, i.e. proportional representation with no coalitions allowed.