I just got a used 45 and spent about 2 hours cleaning it with vinegar. It's been 5 years since I had my last fish tanks ( 2 10 gallons). I invested a lot of time and money in those, one in particular. I have wanted a fish tank ever since, it just wasn't in my budget. But thanks to a local garage sale, got the 45 and a decent HOB filter. Given everything is covered in gnarly hard water build up, once it's clean...
but what I'm sayin is, I see you setting yours up, and I'm really excited to get mine up.