Hi there. I rebuilt my 61 Kenmore set about 10 years ago. I had new center post, and bearings installed. I was shocked how eaten up the old center post was! Anyways, 10 years later, should I pop open the top seal and add more oil? Isn't the top bearing the one that goes bad first? Just thinking of preventative maintenance since I'm 60 yrs old now and a little more arthritis. A rebuild be tough. Could I use a needle oiler to inject past the present seal? Just putting ideas out there, bad or good! Thanks all!!!