Hello, new to the site. I am looking at getting a Massey 2607H, but was wanting to know if there are any major flaws with them. Especially interested in knowing if the Tier 4 emissions control is a problem on them. Also, is there a computer on these tractors? I had looked at a John Deere 5075e, but with a computer to control the emissions and other sensors, it is off the table. Any and all help will be appreciated.