I'm not good in writing, but I'll try. Get somewhat big proxy list. I use 25k list. Save it in a text file. Then go to scrapebox installation folder and then to Configuration folder. There is a scrapebox.ini file, open it. Look inside for a line named "ProxyHarvester". This is the timeout in milliseconds. Change it to something like 1000 to 3000. Then it will check the proxy list with the harvester very fast. AND then give you a fast access proxies. The ping to proxy will be the same as timeout that you set up. I post now with 25 fast proxies way way faster then earlier with 85-120 proxies with standard timeout settings.