Can you comment on which of your pumps would support continous-on operation overnight without overheating?

When I do vaccum bagging, I frequently get pinhole leaks from connectors etc which are difficult to debug. My parts are mostly long tubes of special shapes. All reagents come from you, except that, as a bag,  I use thick long polypropylene sleeves which I connect with your red standard disk-connector, and seal both ends with a hot wire. The leaks appear to be around the connector, and are hard to debug. So  I just set my oil-free pump on continous pumping. It has a feedback, so it switches on/off every 3 seconds to retain the vacuum, which causes overheating, and requires me to set-up a separate cooling fan. I am now considering to get a separate pump, and I am wondering how it would behave if left on cotinously for 12-16 hrs at a time.