Hi, I have a yellow box Aristo U25b. I believe it is PRE ball bearing because there is no mention of it on the box nor is there any mention of it being DCC/battery or sound ready. However, someone did install QSI sound and it is great. I did notice however that it looks "high" on the motor trucks being that there is a lot of clearance like on the older FA's. Will the new ball bearing motor blocks fit and will they LOWER the U25b to a more prototypical appearance?