If you are paranoid.. I might try making very thin lines (one at a time) on the back of the front side blade with a paint marker or liquid paper or whatever. Use these marks as the "TOP" of your sight. T|est fire it. When you find the right height take a dremel grinder to it and get it close, then use a file and finish it slowly.. then some cold blue to clean it up.
just 'spit-balling' here
just 'spit-balling' here