Periodically I have to make very small wiring schematics and currently my company had a bunch of existing blocks however the scale for each was incorrect so I started to make new blocks. I've started to make new blocks and I'm having issues trying to keep each one fully defined and I've run through the tutorials and looked through the help section and I'm starting to think blocks isn't the best way to be doing this.

What I'm trying to achieve is have a set of pre-made sketches that I can drop into a sketch without having to define sizing and relations every time. Do anyone have suggestions on the best way to go about doing this?