I just ground off about like 1.5mm off the lsn to try out and I rounded it of really nice and I find tune much easier to catch. This was a gen 4 carb I had laying around. These carbs were always alittle tough for me to keep a tune on. This is something I recommend to try for everyone. It to me gives the midrange much more pull. The new carbs I have no problem with I was just bored. The 5.5 carb I currently have I havent touched it for like 3 weeks. Thats what I am talking about. Also for temps, some Go's run at 200 some 245, I agree with not worrying obout the numbers if there is a nice amount of smoke dont worry about it.