So im looking for the biggest baddest 120v air compressor i can get my search has lead me to the 29gallon harbor freight (most CFM output and highest HP motor) then there are 2 Dewalt 30gallon options (one with wire cage or one with plastic cage covering pullys slight difference in performance) then there is the kobart that similar to the dewalt but its a 2 stage and the dewalt is single stage and the kobalt is identical to the Campbell. So like are all these air compressors made by the same company then just branded and shipped to different companies? The kobalt has some strange cfm specs showing the cfm at max psi then 100 then 90 and the cfm is more at 100psi than it is at 90psi and I always thought the lower the psi the higher your cfm gets? Should I just got harbor freight 29gal and be done or should I look at these other name brand options that all look very similar. Or should I go with the kobalt that is a 2 stage with wonky cfm ratings? Anyone know the real cfm rating on the kobalt?