i started my first resto its a wayne 866 narrow frame.how do you get the sight glass outer nuts off?are they threaded? dont want to break them.the the lower side panels are rusted through about an inch from the bottom. do you replace them or are they reparable?there is a switch on the upper panel that turned the lights on i think.the cover is missing what is it called and is it available after market.. thanks for any info.. the pump stood guard over our family farm in travers city michigan for many years and will be agreat project