getting ready to purchase a gempro scale . i've been reading up on them . the only complaint I've seen that I question is trickling up to the charge you want . a couple of the reviews I read say that it doesn't catch up to the correct weight and when it does it is over weight . is there a trick to trickling up . I was thinking of getting the gempro 300 only because of the blue back light . I can see it better then the orange any help on this would be appreciated . thanks in advance . rich .