How To: Lego Stamp Postioner

I decided that I needed a stamp positioner.  On my travels to thrift shops recently I purchased a small bag of block.  They are not the brand name but they worked well enough.
Place them 2 block high and create a 90 degree angle.  Cut a piece of clear acetate from packaging (good re use). Cut it to a good 90 degree angle.  Then you can follow the instructions to put that stamp exactly where you need it.