Able, the Peak and Apex exhausts have been known to fracture where they meet, have only had one go on me, and wrapping them can contribute to it happening. They are so short that I doubt you'd notice any heat gain atw. Some guys have said it helps belt longevity however. I have changing the blower belts to a science on them, I can have them changed in 15-20 minutes, and we only have to change them once every 12-18 months on average so it's not worth it for me.
I have gone through a few manifolds on my Peak.. I am a belt changing expert myself though I don't have a problem like I use to since changing to the 2.5 hose, the belts go forever.
I have the century avenger 600's (which for all intents and purposes, is a peak) - I want to say 700 ish hours. The Apex's vary from 600-800 ish. I turn my equipment over every 2-3 years, current gear is about halfway there.
Interesting you sell them at around 1,200 to 1,600 hours? Thats like brand new! With your mechanical ability I would think it would make more sense to run your equipment into the ground? Talk to me next time you sell..
Mine are diesels so they don't get as hot as the gas apex's - on a normal spring/summer day heat is a little higher (very little) on the 600/peak's than the apex d's, in the colder months I'd say the avenger 600/peak does better - but the apex has more suck. At the end of the day there is so little difference with single wanding it's 6 in one hand half dozen in the other.
I have been working my Peak for the last two weeks and I'm kind of torn over what I will buy next.. I think the motor on the Apex is good for over 6,000 hours I guess I'll ride it out and see.
What van do you have? I installed my tm's back (or leftward looking in the side) a few extra inches, I also use the console tank, and have enough room to get the hx'ers out without having to remove anything other than the hose from the waste tank.
I bought this equipment used so I had no imput on how it was set up, and the van(E-350) has a sliding door so i wouldn't want to have it any further to the left.. I can't even get to the bolts under the blower..
Also, the back hx's have brass you can put a wrench on, the frontward one uses barbs so as I'm sure you know they are buggers, I pull the back two and clean them out of the tm, and leave the frontward one in, clean it in the box. I just connect another tm to suck the exhaust port when I do so. Bc I don't have to yank anything else, I can clean the hx'ers in 30 minutes this way.