I play slowly, I have distorted vision in one eye and always use the 90 second timer. But when I'm ready to hit I hit. If it's 15, 30 or 85 seconds I hit when I'm ready. If I was ready then waited for the rest of the time all I would do is second guess myself. Sort of 'icing' myself. LOL
But everyone plays their own way. Be happy
Have fun and hit 'em straight,
John