Good morning - I am looking at buying either a 425 or a 455 produced from 1992 to 2001. Are parts still readily available? The 425 has about 600 hours and the 455 has about 1200 hours. Should I be concerned about the total hours on the 455? Based on everything I have been able to read these are great machines and 1200 hours is nothing on the 455. Any help is appreciated.