We had someone come in with a hollowtech BB today. We have the BBT-9 at the shop that we used to remove his old BB, then he wanted to install a new hollowtech BB, but the new BB had a smaller diameter. We were super busy so I didn't get a good look at it, but all I knew was that we didn't have the tool to install the new one, and we didn't want to go at it with a pair of channel locks.

It seems that I can find 3 types of hollowtech bb diameter. The normal one is 44mm, then the other park tool has diameters of 39mm and 48.5mm (double sided tool.) Are there any other common sizes we should get the tool for now or do those 3 sizes cover it?