I don't worry about consistent temps, FE always believed that you needed swings to get more smoke flavor on pellet grills.
Smokin' taught a lot of us, when he was moderator, that meat doesn't know or care if the temps are consistent. I have been around the comp circuit for a few years and agree with this thought too.
I run mine at 15-75 and smoke mostly in the 250-275* range. I grill at 300-325* and these settings work for that also.