my brothers sled had a few bogs at first at 1500 feet in sask things we found it was lean from set up for here,also found he was smashing the rev limiter lol,he has had to adjust it a few times with weather but he just carries his one sheet of paper to set it,also if u guys r getting alot of bogs and it starts to miss check your reeds we changed his out at 500 boosted 500 non 1000 total miles,also found out that there is a reed stop witch hm turbo sells not sure who else but the next set will get a set of these, tuning what worked for us -determine where the bog is in what range always add fuel first then go down i learnt this one years ago woops,another to remember the afr gauge might not pick up the lean or rich spot fast enough so try just experimenting but always do one spot at a time,i am no pro at this but this worked for us and i hope it helps u