Well, Dave never got back to me on my request to be put onto the queue for a 170 and I never saw my name get placed on the queue on his site, so I decided to order a 170 from Monarch. By the time I got the money they no longer had the OEM 170 for sale, they didn't even list it as out of stock, just flat out removed it. So I went for the 165 OEM. I hope I won't be disappointed with it. As long as I can get it to 2.5 or 2.6 I'll be a happy camper.