Which ELK slot would you compare the volatility to? Cygnus is ranked as "impossible" in my book of volatility. Just as comparison
Played Cygnus the other day, BTW a fabulous slot that is a quite the challenge, and ended with 350EUR in profit with 1EUR bets. Had the FS two times within the first 50 spins. Played then for an hour and didn't trigger it again but didn't lose too much from my balance.
The variance for Cygnus is not that high, an 8/10. Micro Knights is 7.5/10.
Chi and the 3 Gold slots are more volatile between 9 - 10 / 10
Most Elk slots though are similar, they can go 50 - 100 spins paying virtually nothing and then suddenly come alive. I found Sam on the Beach the best example.