I have a CDS 4.8 with a S. Ton of hours on it. I bought it used and has worked great for the last 9 years. Supported my 3 girls after my husband died. Both of my heat exchangers are shot to hell and Jon Don wants a grand each. Kid in college and one about to graduate from high school. 2 grand babies from my oldest. Tough to do. Hoping anyone here might have some advice. I’ll sell my tools before I stop working for my kids. Just need a couple used exchangers or or somewhere to find them cheaper. Sorry for the long thread.