New Scale..which one to use

Our old scale was hobbling, literally...it had only 3 legs so you had to precariously balance yourself to get a good reading. 70+days into this, I found a new scale and it arrived yesterday.

http://www.amazon.com/gp/product/B004L6NTHU/ref=oh_o00_s00_i01_details

I am so far very impressed with it EXCEPT...I weighed 3 pounds less than on my old scale and so did hubby. I create mini goals for myself, so my first minigoal is being in one-derland again. I am 4.4 lbs away from that goal and that is a very big hurdle for me. However, on the new scale, I was almost there. Yikes.

I am excited to use the new scale and know it is about pounds lost, not the number. But, I think I am going to keep using the old scale until I see 199.0 and then transition over. Maybe it will give me some positive momentum.

Thoughts? Which would you say is the accurate weight? The new one or the 3 legged one?

Thanks!