The issue is that when playing, or raising and lowering playfield, the clips can fall off, or touch and short.
Truly permanent Mods, especially in tricky areas, should be permanent by solder, or T splice clips.

I personally have had no issue, when used in an open area, that is not subject to clutter, moving parts,
or frequent service.

Its a choice, which is why Comet has the Matrix system....change the Bulb and plug in the strip.
This is reversible, non evasive, and no solder.....