I have a 2014 Scott spark 730. Looking to get into a 1x 11 setup installed but looking g for some advice first. I'm not sure what size chain ring to get first of all.. I've heard that the 28t ring is quite a bit more efficient than the others.. if I go that route is there anything in particular I should look out for? Is the chain drop issue worked out on the Shimano XT groupset? That's the groupset I've been looking at.