Somewhere along the line of multiple iterations of printed upgrades I ended up with a permanent angle between the Y and Z axis. To correct for this, I came up with the adjustable YZ version of my 300mm No Sag for the Printrbot Simple versions BEFORE the 1405.
For the 1405 version please see:
I have been running with this upgrade since Feb. 2015 and am very happy.
What I have done here is split the YZ plate from the original 300mm No Sag, and bolted it back together with slotted holes. You should be able to get about 5 degrees of adjustment up and down.
One word of warning, the adjustment bolt bracket is not very strong. I would not suggest trying to crank up the angle with any tension on the mounting bolts.
If you were using the bearing blocks before, they are not possible with an adjustable angle. I have included routes for zip ties.