IMHO you are very lucky if you get one with the side adjust. So much better, and easier to use. I bought a 028 Super brand new, and it's Absolutely one of the best buys I ever made in my whole life. I completely lucked out and got a very late model with the side adjust and the double screw on the air filter. The only problem there is that you MUST get an air filter that fits Exactly right or you'll have nothing but trouble.
The second 028 Super I bought off of eBay, and I looked for YEARS, and bid on several, getting sniped in the last 5 seconds several times until the last time when I was the sniper, and I got ALMOST the exact saw I wanted for $231 delivered. It needed a little bit of work, but it's a side adjust model, and it runs very well. I'm glad to Finally have gotten another saw like I wanted.
In my opinion, these are fantastic saws, much better than any saw you could buy for anything like that kind of money.
How many things can you buy these days and use every year for 40 something years and have it still run like brand new!?!