No problem glad it works.
Not really. I've had my 244 for like 6 years and never used all 4 channels at once. All I can think is if you're recording your band or you want to record say acoustic guitar in stereo and also have a distant room mic for ambiance. Other than situations like that you should be fine.
PS. Get some good tape from NAC, too. Their chrome tape is good.
You're most welcome - hope you enjoy using it, they are amazing machines!