ran fine til tank failed?

020t tank was leaking. Bought used ms200t tank online. bought new oem tank vent and rubber valve.
had to buy new flip gas cap too. saw had been sitting
a couple of years. put on all the new parts and used tank. reassembled the saw(intake boot, handle,wt326 carb, cleaned the carb before reassembly. started right up. set the low screw at one turn. Shortly after starting and running well:It revved up. rpm,s went up/down, wouldn't idle, then hard to start. pulled the carb and found a tear in the diaphragm. had spare c1qs61d.installed it still had similar issues. read online about the zama s61d.it was all bad. notorious for the compensating carb. found a good diaphragm for the wt326c.new pulse line too. what should if this doesn't solve the issues I've described?