When a new spark is created, it has a life of four, which causes the lenght of the spark on any type of metal to be 8 pixels. For compact circuits that lenght often causes problems. I recently made a memory system (which uses METL and INWR) in which the length of sparks prevented it from working properly if two adjacent cells have '1' stored in them.
8px Sparks are a hell to work with when building compact circuits so please shorten them.
the problem is it might throw the time off for some saves... And then they would no longer work.
why not just use INST...