Nimzo2005

The sixth string tuner of my Seagull S6 is getting harder and harder to turn. I'd like to change it by myself. But, first, I have to choose a new one(s) and there are so many options. Seagull guitars are equipped with 14:1 tuners. 12:1 are more accurate? Of course, I don't want to spend too much (no Waverly). Have someone already done this? Many thanks.