At a minimum you need to reinforce the legs or build a new stand. The legs as they come are a bit flimsy but a bit of angle iron along the bottom works wonders.
Remove the spring based lowering gear and replace it with a hydraulic one. I put a small cylinder on mine ($12.00 at the time, surplus, nothing fancy) plus a needle valve and some tubing and fittings. Makes a big difference.
Make sure the ball bearing guides are adjusted properly. If not the blade will always cut a curve and may break the blade. Guides are mounted on eccentric pins so you just loosen, adjust and tighten.
You could mount some kind of cutting oil dispenser but a can of WD 49 works as good, just remember to lubricate as you cut or the work will jam and knock the blade off of the wheels.
These saws are about the best bang for your buck you can get in a home shop
The shortest distance between two points is a circle of infinite diameter.